Elements in the same period Question 7 options: A) form bonds with the same type of elements. B) have the same number of protons. C) have the same number of valence electrons. D) have the same principal quantum number.

Answers

Answer 1

D is the answer .. I have send u pic also

Elements In The Same Period Question 7 Options: A) Form Bonds With The Same Type Of Elements. B) Have

Related Questions

How are nucleic acids and proteins similar?
O A. They are both polymers.
O B. They are both made of amino acids.
O C. They are both made of carbohydrates.
O D. They are both polysaccharides.

Answers

They are both large polymers

Polymers can be found naturally in plants as well as in animals or can be human made or synthetic. Here nucleic acids and proteins similar, because They are both polymers. The correct option is A.

What are polymers?

The large macromolecules which are formed by the combination of a large number of smaller subunits called the monomers are defined as the polymers. The polymers are present all around us, also in DNA which is a naturally occurring biopolymer.

Proteins, starch, cellulose, etc. are natural polymers. Nucleic acids are the polynucleotides of very high molecular mass formed from the linking of nucleotide units. They are important biopolymers for the transmission of hereditary character.

Proteins are also complex molecules from the amino acids and they are responsible for the metabolism, defense, etc. Keratin is a protein found in the outer part of skin.

Thus the correct option is A.

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calculate the number of atoms in 1g of calciumj​

Answers

Answer:

It's about mass of 40.1⋅g

Explanation:

I hope this helps you out. Have a nice day!

balance this equation

Si Cl4 + H2O → Si (OH4) + HCl

Please give a detailed explanation​

Answers

Answer:

4HCl  +  SiO2 → 4H2O  +  SiCl4

axit clohidric  Silic dioxit  nước  Silic tetraclorua

Axit      

Explanation:

Answer:

SiCl4 + 4H2O--->Si(OH4)+4HCl

Explanation:

if you put a 4 in front of H2O it means you will have 8 hydrogens(you multiply 4 by 2) then the oxygens will be 4..on the other side that hydrogen in the brackets holds it's on 4 so that 4 isn't for both the hydrogen and the oxygen...and if you put a 4 in front of the HCl that simply means it's for both the hydrogen and oxygen.

I hope this helps

can you solve question 1 and 2.
I need it. :)​

Answers

Answer:

The answer is below

Explanation:

1.

Tap water - Mixtures

Sodium - Compound

Nitrate - Compound

Rust - Compound

Distilled - Compound

Water - Compound

Paint - Mixture

Sugar - Compound

Carbon dioxide  - Compound

Brine - Mixture

Apple Juice - Mixture

Petrol - Mixture

Ink - Mixture

Alcohol - Compound

____________________________________________

A) - Chromatography

B) - Fractional Distillation

C) Simple Distillation

D) Filtration

Q.1 Classify the following as mixture or compound :

MIXTURE :

Tap water Paint Brine Apple juice Ink

COMPOUND :

Sodium nitrate Rust Distilled water Sugar Carbon dioxidePetrol Alcohol

Q.2

Chromatography fractional distillationsimple distillation filtration

HOPE SO IT HELPS YOU

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Give reasons. a. Troposphere is affected maximum by human activities.​

Answers

Answer:

it is where the ozone layer is locate which is affected by human activities

6- the chemical formula of carbonate salt contain monovalent cation is ..........
O XCO3
O X2HCO3
O X2CO3
O X(HCO3)2
7- after adding sodium hydroxide into hydrochloric acid, pH will
O Increases
O decreases
O remains constant
8- the reaction between calcium hydroxide and Nitric acid forming ........
o Ca(NO2)2
O Ca(NO3) O Ca(NO3)2
o Ca(NO2)

Answers

Answer:

6-

[tex]{ \sf{XCO _{3} }}[/tex]

because X has only one positive charge.

7-

[tex]{ \sf{increases}}[/tex]

because there is increase in hydroxyl ions which decrease the acidity or hydrogen strength of hydrochloric acid.

8-

[tex]{ \sf{Ca(NO _{3} ) _{2} }}[/tex]

Calcium has a valency of 2 and nitrate ion radicle has valency of 1

Mother is frying fish in the kitchen. The aroma of fried fish can be smelled by Sofea who is sitting in the living room. Explain how the aroma of the fried fish reach the living room.​

Answers

Answer:

through process of diffusion

Explanation:

air particles and odours move freely in all directions and eventually spreads out thus reaching the sitting room

The process of diffusion causes the particles of the aroma of the fried fish to reach the living room.

What is diffusion?

Diffusion can be described as the net movement of anything such as molcules, or energy from a region of higher concentration to a region of lower concentration. Diffusion is generally driven by a gradient in Gibbs free energy or chemical potential.

The concept of diffusion can be used in fields such as physics, chemistry, biology, sociology, economics, and finance. The central idea of diffusion is common that a substance undergoing diffusion spreads out from a point or location at which there is a higher concentration of that substance.

A gradient can be defined as the change in the value of an amount such as concentration, pressure, or temperature with a change in another variable, distance.

A change in concentration over a distance is known as a concentration gradient, and a change in pressure over a distance is known as a pressure gradient.

The Latin word diffusion means "to spread out." Therefore, the aroma of the fried fish diffuses and reaches to lining room.

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How are energy and mass connected during the formation of an
atom?

Answers

Answer:

Energy is absorbed, so the mass is increased. Energy is released, so the mass is increased

Somebody please help me with this.

Answers

Answer:

2. Chemical reactions changes occur when the bonds between atoms in a molecule are created or destroyed.

3. When you reach your its boiling point, the molecules in liquid have enough energy to become a gas.

4. When you have a solid with more than one type of compound, it is called a mixture.

5. A Crystal is a form of solid where the atoms are arranged is a very specific order.

6. If you have different types of molecules dissolved in a liquid, it is called a solution

one similarity between physics and chemistry is...

Answers

Answer:

They are branch of science.

Explanation:

hope this helps

Answer:

Branch's of science yk

Explanation:

I'm smart lol

Câu 36: _VD _Hình lập phương có thể tích là 1253 thì diện tích đáy là:

A. cm2 B. 5cm2 C. 25cm2 D. 52cm2

Answers

Answer:

c

Explanation:

Cạnh của hình lập phương là

³\(125 = 5cm

Diện tích đáy của hình lập phương là

5²=25cm²

Đáp án C

Which factors ALL increase reaction rate?


decrease temperature, stir, increase surface area, remove catalyst

none of these

increase temperature, increase surface area, add catalyst, stir

increase temperature, stir, decrease surface area, add catalyst

Answers

Answer:

increase temperature, increase surface areas, add catalyst, stir

The rate of reaction can be increased with the increase in temperature, surface area, adding catalyst and allowing stirring. Thus, option C is correct.

What is rate of reaction?

The rate of reaction is given as the rate of formation of product or the rate of disappearance of reactant in unit time.

The rate of reaction can be affected with:

Increase in temperature - It will increase the collisions between the reactants, and thereby the rate.

Increase in surface area - It results in increased interaction of the reactant molecules for the formation of product.

Catalyst - It lowers the activation energy of the reactant, and thereby increases the rate of reaction.

Stirring - It mediates the increase in the collisions and the surface area, and resulting in increased rate of reaction.

Thus, the rate of reaction can be increased with the increase in temperature, surface area, adding catalyst and allowing stirring. Thus, option C is correct.

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PLEASE HELP URGENT!!
What is the SI system? What are its benefits?

Answers

Answer:

The SI system : The international system of units.

It is a scientific method of expressing the magnitudes or quantities of important natural phenomena.

Benefits of SI system

It is a coherent system of units ( a system based on certain sets of fundamental units )It is a rational system of units ( it assigns only one unit to a particular physical quantity )

A student with a body temperature of 37°C holds a piece of ice that has a
temperature of -8°C.
Which statement best explains what happens?
1. Thermal energy transfers coldness from the student's hand to the ice.
2. Heat transfers coldness from the ice to the student's hand.
3. Heat transfers thermal energy from the student's hand to the ice.
4. Thermal energy transfers heat from the student's hand to the ice.

Answers

Answer:

Thermal energy transfers hear from the students hand to the ice


Classify each area of study as being a branch of science or not a branch of science. If you're unsure, take your best guess.
Drag each tile to the correct location.
SCIENCE
NOT SCIENCE

astronomy
astrology
biology
chemistry
geology
physics
theology

Answers

Answer: Science : Chemistry, astronomy , biology , physics , biology ,geology. Notscience : Astrology and theology

Explanation: Astrology and theology are non scientific areas of study.

Which of the following is the formula for vanadium (II) oxide? Question 11 options: A) VO2 B) VO C) V2O3 D) V2O5

Answers

Answer: A. ( VO2)

Explanation:

Answer:

B) VO

Vanadium(II) oxide is the inorganic compound with the idealized formula VO.

what was the control group for this experiment?

Answers

Answer:

a

Explanation:

the rat felt the normal diet with vitamin are gain weight than the rat felt with diet

Balance
Mg +O2
NH3+ H2SO4
H20+O2​

Answers

Answer:

MgO2

H202

NH4)2SO4

Explanation:

hope this helps you

Identify any three acids.
Identify any three bases.

Answers

Acids:
Sulfuric acid, hydrochloric acid, nitric acid,

Bases:
Potassium hydroxide (KOH)
Sodium hydroxide (NaOH)
Barium hydroxide (Ba(OH)2)

what are the products of the neutralization reaction between HCl and Ca(OH)2

A. CaCl2 and H2O
B. Cl2 CaO, and H2
C.CaCl and H3O+
D.CaH and HClO

Answers

A. CaCl2 and H2O
HCl +Ca(OH)2. CaCl2 +H2O

15. Sodium chloride is called an electrovalent compound whereas carbon dioxide is called covalent compound why?​

Answers

Answer:

NaCl is an electrovalent compound because the sodium and chlorine atoms give one electron from their outermost shells to each other in order to complete their octets

Explanation:

Make me Brain liest plz );

possible isomers of C4H9I​

Answers

Answer:

there are 4 possible isomers

How can we identify that the absorption of heat has occurred?​

Answers

Answer:

rise in temperature and the effect it has on our global weather patterns

What is consciousness? ...​

Answers

Answer:

Consciousness refers to your individual awareness of your unique thoughts, memories, feelings, sensations, and environments. Essentially, your consciousness is your awareness of yourself and the world around you. This awareness is subjective and unique to you.

Explanation:

refers to your individual feelings or sense or thoughts

Explain which intermolecular force is primarily responsible for the unusually high boiling point of H2OH2O. Compare the strengths of intermolecular forces of attraction present in a sample of liquid water to the strengths of intermolecular forces of attraction present in liquid samples of H2SH2S, H2SeH2Se, and H2TeH2Te. Justify your answer using the information presented in both tables, and complete the statements below.

Answers

Answer:

See explanation

Explanation:

Intermolecular forces are forces of attraction that exist between molecules of a substance in a particular state of matter.

The dominant intermolecular force of attraction in H2O is the hydrogen bond. The hydrogen bond exists between molecules of a substance when the substance is made of hydrogen atoms bonded to atoms of a highly electronegative element. Hence, strong hydrogen bonding accounts for the high boiling point of water.

The magnitude of hydrogen bonding between molecules depends on the electro negativity of the atoms to which hydrogen is bonded.

The more the electro negativity of the atoms to which hydrogen is bonded, the greater the magnitude of intermolecular hydrogen bonding.

Since the electro negativity of elements decrease down the group, the strength of intermolecular hydrogen bonding between the molecules decreases as follows;

H2O> H2S> H2Se> H2Te

In a hospital, bags of saline solution are used to rehydrate patients. They are made by dissolving a specific amount of salt in water. What is the solvent in the saline solution?

A. Bag
B. Patient
C. Saline
D. Water

Answers

D. Water

The solvent is the liquid that the solute (salt) is dissolved in.

Water is the solvent in the saline solution. Hence, option D is correct.

What is the solute?

A solute is something being dissolved, a solvent is a thing dissolving the item, and the solution is the mixture of the two items.

In a hospital, bags of saline solution are used to rehydrate patients. They are made by dissolving a specific amount of salt in water. Water is the solvent in the saline solution.

Hence, option D is correct.

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A student measures the volume of a small irregularly- shaped stone. Which apparatus must be used? a. a measuring cylinder containing water and a ruler only. b. a measuring cylinder containing water only. c. an empty measuring cylinder and a ruler only. d. a ruler only.​

Answers

Answer:

a measuring cylinder containing water only.

Explanation:

If we want to measure the volume of an irregular object. We need a properly calibrated measuring cylinder filled with water of known volume.

The irregular object is now inserted into the measuring cylinder containing water and the change in the volume of water is noted. The volume of the irregular object is now obtained as;

New volume of water - initial volume of water.

Hence, only a measuring cylinder filled with water is required to measure the volume of a small irregularly- shaped stone.

PLZ HELP ME WITH MY WORK​

Answers

Answer:

c. H2 andO2

I think this is the answer not sure ok

what is element Na in a periodic table

Answers

Answer:

Sodium.  

Explanation:

Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na.

Answer:

sodium

atomic mass 22.99

atomic number 11

period 3 group 1 1a

sodium is also an Alkali metal

Explanation:

I have a periodic table on my computer I hope I helped

Write a balanced molecular equation describing each of the following chemical reactions.
(a) Solid calcium carbonate is heated and decomposes to solid calcium oxide and carbon
dioxide gas.
(b) Water vapor

Answers

Answer:

don't know..............

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