Representa gráficamente con una breve descripción de los modelos de Bohr correspondientes a los siguientes elementos representativos: Nitrógeno, Sodio, Calcio, Bromo, Neón

Answers

Answer 1

Answer:

Here's what I get  

Explanation:

1. Nitrogen

A nitrogen atom has a central positively-charged nucleus surrounded by seven electrons. Two are in the first energy level and the other five are in the second.

2. Sodium

In a sodium atom 11 electrons surround the nucleus in three energy levels in a 2-8-1 order.

3. Calcium

In a calcium atom 20 electrons surround the nucleus. The electron shell configuration  is 2-8-8-2.  

4. Bromine

The Bohr model of a bromine atom would show 35 electrons surround the nucleus in a  is 2-8-8-17 shell configuration.  

More modern variations use principal quantum numbers and a 2-8-18-7 arrangement.

5. Neon

A neon atom has 10 electrons surrounding the nucleus in a 2-8 shell configuration.  

Representa Grficamente Con Una Breve Descripcin De Los Modelos De Bohr Correspondientes A Los Siguientes

Related Questions

HELPPP. What is the molarity (molar concentration) of a 500.0mL that contains 5.60g of KOH? Please show your work, with units, and include a therefore statement.

Answers

Answer:

.2 M

Explanation:

grams/molar mass=ans./volume(L)=molarity

5.6/56=ans./.500=.2 M

- Hope that helps! Please let me know if you need further explanation.

Why is a telephone considered an example of matter?

Answers

Answer:

Matter is anything that is made up of atoms. Whether its a computer, a drink, a suitcase, a telephone, whatever.

If it has mass, if it occupies space, and if it has volume, then it is matter.

Also, matter comes in the form of solids, liquids, and gasses.

In this case, the telephone is a solid.

plzzz mark me brainliest if this helped :)

I need 3 more brainliests to become an expert

Answer:

Matter is anything that is made up of atoms.

Explanation:

If it has mass, occupies space, and has volume, then it is matter. Also, matter comes in the form of solids, liquids, and gasses. The telephone is a solid.

In ΔDEF, the measure of ∠F=90°, FE = 16, DF = 63, and ED = 65. What ratio represents the tangent of ∠E?

Answers

Answer:

63/16

Explanation:

tanE=  

adjacent

opposite

​  

=  

16

63

Answer:

63/16

Explanation:

this for delta math?

A 5.72-L football is filled with air at 1.85 atm. At the same temperature, the volume of the football is reduced to 2.13 L. What is the pressure of air in the ball?

Answers

Answer:

4.97 atm

Explanation:

P2=V1P1/V2

I know this is correct because P and V at constant T have an inverse relationship.

- Hope that helps! Please let me know if you need further explanation.

Calculate the molarity of a nitric acid solution if 38 ml of the solution is neutralized by 16 ml of 0.25 M barium hydroxide solution. The balanced equation for the reaction is

Answers

Answer:

l

Explanation:

Consider the equation for acetic acid plus water HC2H2O2 + H2O --> C2HcO2- + H3O+ a)compare the strengths of the two acids in the equation. Do the same for the two bases. b) Determine which direction -- forward or reverse -- is favored in the reaction.

Answers

Considering the two acids and bases involved, the reverse reaction is favored.

Reversible reaction

The term reversible reaction refers to a reaction that can go either forward or backwards depending on the conditions of the reaction.

We must recall that acetic acid is a weak acid hence the equilibrium position would always lie towards the left hand side of the equation. Hence considering the two acids and bases involved, the reverse reaction is favored.

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Complete and balance this neutralization reaction: HNO3 + Al(OH)3

Answers

Answer:

Al(OH)3 + HNO3 = Al(NO3)3 + H2O - Chemical Equation Balancer.

Explanation:

3z-1
= 162+2.642-2
4

Z=​

Answers

the answer is z = 47.214

Answer:

z = 47.214

Hope this helped

What is the pH of a solution that has a [ ] = 0.020 M?

Answers

Answer:

HCl is a strong acid, it dissociates 100% (I.e. completely): [HCl]F = 0.020 M = [H3O+] So, pH = - log [H3O+] = -log [HCl]F = -log(. 020)=1.70 Voila!

A redox reaction is set up so that both half reactions take place in separate beakers that are connected by a salt bridge and a wire. A path for the transfer of ions is provided by the? (1) anode (2) cathode (3) salt bridge (4) wire

Answers

Answer:

Salt bridge

Explanation:

Salt bridge is used in an electrolytic cell to transfer electrons from the anode to the cathode.

Salt bridge are used because they do not interfere with the constituents of the cell I.e the anode (+very electrode) and cathode(-ve electrode).

Examples of salt bridges are AgNO₃, KCl etc.

Salt bridge can be described as a tool used to link the oxidation half cell and reduction half cell in an electrolytic set-up or galvanic cell.

Which word describes the amount of matter an object contains?
O altitude
Odensity
O mass
O pressure

Answers

Mass would be the amount of matter an object contains.

In order to control pollution, you should reduce the need for _____________ goods and transportation.

Answers

Answer:manufacture

Explanation:

The pollution can be controlled with the help of reducing the need for the manufactured good and transportation.

What is pollution?

A pollution can be given as the presence of the harmful substances in the environment. The harmful substances known as pollutants deteriorate the quality of the environment and effect the health of living organism as well.

The pollution in air has been contributed with the increased need of the manufactured goods and transportation, and thereby the reduction will be found to reduce the pollution too.

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Which of the following is the correct definition of conduction?
A.
the transmission of heat across empty space
B.
the electromagnetic radiation from the surface of an object which is due to the object's temperature
C.
the transfer of heat by currents within a liquid or gas
D.
the transmission of heat across matter

Answers

answer would be d the transmission of heat across matter

Answer:

the transmission of heat across matter

Explanation:

Conduction is the transmission of heat across matter. Even though heat flows across matter during conduction, the matter itself does not flow.

What is the value for AG at 500 Kif AH = 27 kJ/mol and AS = 0.09 kJ/(mol-K)?

Answers

Answer: -18

Explanation:

Facts

What is the value for ΔG at 500 K if ΔH= 27 kJ/mol and ΔS = 0.09 kJ/(mol⋅K)?

Explanation: ΔG= -18 kJ/mol

does temperature and pressure affect the solubilty of any solute

Answers

Answer:

Yes very much so, especially gases

Explanation:

Solubility of gases decrease with increasing pressure. Be familiar with Henry's Law.

- Hope that helps! Please let me know if you need further explanation.

Answer:

Yes, it does.

You are given the reaction Cu + HNO3 Cu(NO3)2 + NO + H2O complete the final balanced equation based on half-reactions

Answers

The balanced equation based on half-reactions is 2Cu + 8HNO3 + 6H+ -> 2Cu(NO3)2 + 2NO + 4H2O.

How to determine the balanced equation based on half-reactions

To complete the balanced equation for the given reaction Cu + HNO3 -> Cu(NO3)2 + NO + H2O using half-reactions, we need to break down the overall reaction into separate oxidation and reduction half-reactions.

1. Oxidation Half-Reaction:

Cu -> Cu2+ + 2e-

In this step, copper (Cu) is oxidized, losing two electrons to form copper(II) ions (Cu2+).

2. Reduction Half-Reaction:

HNO3 + 3H+ + 2e- -> NO + 2H2O

In this step, nitric acid (HNO3) is reduced, gaining two electrons to form nitric oxide (NO) and water (H2O).

Now, to balance the half-reactions, we need to make sure that the number of electrons gained in the reduction half-reaction is equal to the number of electrons lost in the oxidation half-reaction. In this case, we can achieve this by multiplying the oxidation half-reaction by two.

Balanced Half-Reactions:

Oxidation: 2Cu -> 2Cu2+ + 4e-

Reduction: HNO3 + 3H+ + 2e- -> NO + 2H2O

Finally, we can combine the balanced half-reactions to obtain the balanced equation for the overall reaction:

2Cu + 8HNO3 + 6H+ -> 2Cu(NO3)2 + 2NO + 4H2O

Therefore, the balanced equation based on half-reactions is 2Cu + 8HNO3 + 6H+ -> 2Cu(NO3)2 + 2NO + 4H2O.

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5. How is a cell wall different from a cell membrane?

Answers

Cell membrane is present is all cells while cell wall is only present in plants, bacteria, fungi and algae. ... Cell wall is made up of cellulose whereas cell membrane is made up of lipids and proteins.

What is an oxidizing agent ?

Answers

Answer:

A substance that tends to bring about oxidation by being reduced and gaining electrons

Explanation:

Answer:

An oxidizing agent is a substance that takes negatively charged electrons "away" from a substance or object; usually taking these electrons for itself it can also transport the electrons from an object and "give" them to another substance or object. The object that has been oxidized will then have a positive charge after losing the negative electrons and the substance receiving the electrons will become negative.

Explanation:

Examples include halogens, potassium nitrate, and nitric acid.

Could u please balance this equation

Answers

Explanation:

I don't know how to explain

What is the formula for frequency?

Answers

Answer:

Frequency = Velocity / Wavelength

or

f = v / λ

Which of the following is an example of the endocrine system maintaining homeostasis?

Group of answer choices

Detecting a pain stimulus and sending a signal to the spinal cord to perform an automatic response

Producing an excessive amount of hormones in the blood and not sending a signal to stop production

Releasing insulin to decrease blood sugar and releasing glucagon to increase blood sugar

Using sense organs to get information about the outside world and direct an appropriate body response

Answers

Answer:Releasing insulin to decrease blood sugar and releasing glucagon to increase blood sugar

Explanation: homoestasis is the process by which the body keep it's internal environment constant, regardless of change in the external environment. The human body has a normal range in which it's system operates and it uses homoestasis to keep these at constant.

Homeostasis could be positive or negative. It usually involves a sensor which detects the changes in the body and passes the information to the control center, a control center which receive information from the sensor and sends signals to the effectors and the effector which acts on the information sent by the control center to effect normalcy.

In this case, when a person eats food,he gets glucose. Blood sugar most be kept at constant so the endocrine system release the hormone insulin. Insulin helps to convert glucose to glycogen, which is the form it can be stored in the liver

When the blood sugar levels is low, the brain which is the control center causes glucagon to be released . This hormone converts glycogen to glucose

Answer:

Answer:Releasing insulin to decrease blood sugar and releasing glucagon to increase blood sugar

Explanation:

Grinding a seltzer tablet into powder increases the rate of reaction due to an increase of which factor?
Temperature
Surface area
Reactants
Concentration

Answers

Answer:

Surface area

Explanation:

The rate of a chemical reaction is increased when the surface area of a solid reactant is increased. This can be done by cutting the substance into small pieces, or by grinding it into a powder. If the surface area of a reactant is increased, it implies more particles are exposed to the other reactant.

When a seltzer tablet is ground into powder, the idea is to expose more of its surface to the other reactant. Since rate reaction depends on effective collision between reactants, more exposed particles implies a greater degree of collision between reactants and a faster rate of reaction.

Answer:

the answer is the second option got it right so do worry

Explanation:

hope this helps

In Humans, the liquid waste
filtered by the kidneys is stored
in the ......?
A) Stomach
B) Bladder
C) Lungs
D) I'm not sure. I need
more help with this
topic.​

Answers

the answer is b (bladder)

Why does the addition of a solute lower the freezing point of a solution?

A The solute is colder than the solvent.

B The solute disrupts crystal formation by the solvent.

C The solute tends to sink to the bottom of the solution.

D The solute has bigger molecules than the solvent.​

Answers

Answer:

B

Explanation:

your answer is gonna be B

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns? Select one: A new substance is produced. Coal is made up of more than one element The shape of the coal changes. Oxygen is present.

Answers

Answer:

a new substance is produced

Explanation:

i just took my test and got this question right

The best evidence that a chemical reaction occurs when coal burns is a new substance is produced. The correct option is A.

What is coal?

Coal is a carbon containing fossil fuel, which is formed when the organic matter is decomposed inside the earth with heat and pressure by the earth crust. It is the most used fossil fuel.

Carbon dioxide is a gas produce when these fossils fuel burned. It is a green house gas and increase the warmth of the earth when produced. It is taken by plants to make their food.

When coal burns, it produces carbon dioxide which is a gas and coal is a solid, so here the chemical reaction is happening which is producing a new substance.

Thus, the correct option is A. A new substance is produced.

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When will the simping end

Answers

Answer:

Nvr XD

Explanation:

Answer:

the world may never know

Explanation:

What is the molarity of a 50.0 ml aqueous solution containing 10.0 grams of table sal, Nacl?

Answers

Answer:

The molarity of a 50.0 ml aqueous solution containing 10.0 grams of table sal, Nacl, is 3.42 [tex]\frac{moles}{L}[/tex]

Explanation:

Molarity is a unit of concentration based on the volume of a solution and is defined as the number of moles of solute per liter of solution. Then, the molarity of a solution is calculated by dividing the moles of the solute by the liters of the solution.

[tex]Molarity (M)=\frac{number of moles of the solute}{volume of the solution}[/tex]

Molarity is expressed in units ([tex]\frac{moles}{liter}[/tex]).

Then you must know the amount of moles of the NaCl solute. For that it is necessary to know the molar mass. Being:

Na: 23 g/moleCl: 35.45 g/mole

the molar mass of NaCl is:  23 g/mole + 35.45 g/mole= 58.45 g/mole

Then a rule of three applies as follows: if 58.45 grams are present in 1 mole of NaCl, 10 grams in how many moles will they be?

[tex]moles=\frac{10 grams*1 mole}{58.45 grams}[/tex]

moles= 0.171

So you know:

number of moles of solute= 0.171 molesvolume= 50 mL= 0.05 L

Replacing in the definition of molarity:

[tex]Molarity (M)=\frac{0.171 moles}{0.05 L}[/tex]

Solving:

Molarity= 3.42 [tex]\frac{moles}{L}[/tex]

The molarity of a 50.0 ml aqueous solution containing 10.0 grams of table sal, Nacl, is 3.42 [tex]\frac{moles}{L}[/tex]

The pressure of a 70.0L sample of gas is 600 mm Hg at 20.0C. If the temperature drops to 15.0C and the volume expands to 90.0L, what will the pressure of the gas be?

Answers

Answer:

458.7 mmHg

Explanation:

Step 1:

Data obtained from the question. This includes:

Initial volume (V1) = 70L

Initial pressure (P1) = 600 mmHg

Initial temperature (T1) = 20°C

Final temperature (T2) = 15°C

Final volume (V2) = 90L

Final pressure (P2) =...?

Step 2:

Conversion of celsius temperature to Kelvin temperature.

This is illustrated below:

T(K) = T (°C) + 273

Initial temperature (T1) = 20°C

Initial temperature (T1) = 20°C + 273 = 293K

Final temperature (T2) = 15°C

Final temperature (T2) = 15°C + 273 = 288K

Step 3:

Determination of the new pressure of the gas.

The new pressure of the gas can be obtained by using the general gas equation as shown below:

P1V1/T1 = P2V2/T2

600 x 70/293 = P2 x 90/288

Cross multiply to express in linear form

P2 x 90 x 293 = 600 x 70 x 288

Divide both side by 90 x 293

P2 = (600 x 70 x 288) / (90 x 293)

P2 = 458.7 mmHg

Therefore, the new pressure of the gas is 458.7 mmHg

mention two instruments that could be used to transfer sodium hydroxide solution into conical flask​

Answers

Answer:

Pipette and Burettes

Explanation:

The two instruments that can be used for  

a) Pipette – It is used to dispense measured volume of any liquid into any other equipment. Pipette works on the concept of creating a partial vacuum to take in the liquid and then release the volume  to dispense the  liquid.

b) Burettes – It has a stopcock that regulate the release of liquid. It is larger than the pipette and works as a graduated cylinder.

A gas sample is stored in a 2 liter container under 3 atmospheres of pressure at 28 C. If the gas is placed into a 5 liter container at 39 C, what will the pressure be?

Answers

Answer:

28c

Explanation:

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