An atom of which element has the largest atomic radius?

A)
B

B)
Be

C)
N

D)
Ne

Answers

Answer 1

Answer:

B) Be

Explanation:

Across the period (going from left to right of the periodic table), the atomic radius decreases. Beryllium is located further on the left of the periodic table compared to the other elements in the option and thus it has the largest atomic radius.

Explanation of trend:

Across the period, the number of protons and electrons increases in the atom. Electrons are added to the valence shell, hence the electrons added are not able to shield the increased nuclear charge well. (Since shielding effect is most effective when core electrons shield the valence electrons) Therefore, the effective nuclear charge (ENC) increases. As ENC increases, valence electrons are increasingly attracted to the nucleus. They are drawn closer to the nucleus, and so the atomic radius decreases across the period.

What is ENC?

ENC is the net nuclear charge acting on the valence electron (since the valence electron experiences electrostatic forces of attraction by the positively charged protons in the nucleus, and an electron-electron repulsion force by the core electrons)

➣ ENC

= nuclear charge (atomic no.) - shielding constant (no. of core electrons)

See diagram: black arrow represents the shielding effect (also known as electron-electron repulsion), while the orange arrows represent the nuclear charge (electrostatic forces of attraction)

An Atom Of Which Element Has The Largest Atomic Radius?A)BB)BeC)ND)Ne

Related Questions

How many moles of calcium chloride are contained in a 333 gram sample?
*
A) 8.82 moles
B) 0.333 moles
C) 4.30 moles
D) 0 3.00 moles

Answers

Answer & Explanation:

The molar mass of calcium chloride is 110.98 g/mol. We can use this information to solve this problem. We can set up our equation like this..

[tex]\frac{333 g(CaCl2)}{} *\frac{1mol(CaCl2)}{110.98g(CaCl2)}[/tex]

Multiply straight across on the top and straight across on the bottom.

[tex]\frac{333}{110.98}[/tex]

Now divide.

[tex]\frac{333}{110.98}=3.00[/tex]

So, there are 3.00 moles of calcium chloride contained in a 33 gram sample which is answer choice D.

Use the drop-down menus to identify each substance as an organic or inorganic compound
ozone (O3):
methane (CH4):
aluminum hydroxide (Al(OH)3):
butane (C4H10):
carbon monoxide (CO):

Answers

Answer:

ozone (O3): inorganic

methane (CH4): organic

aluminum hydroxide (Al(OH)3): inorganic

butane (C4H10): organic

carbon monoxide (CO): inorganic

Explanation:

An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. Some simple compounds that contain carbon are often considered inorganic. Examples of inorganic compounds include carbon monoxide , carbon dioxide , carbonates, carbides , cyanides, cyanates, and thiocyanates. Most of these compounds are normal parts of mostly organic systems, including living organisms. When a chemical substance is classified as inorganic, it does not necessarily mean that it does not occur within

living things.

Organic compounds typically contain the carbon-hydrogen bonds. The carbon atoms often catenate and most organic substances occur in living systems and are products of biochemical reactions in living organisms. However, organic substances can also be synthetic and can be prepared in the laboratory.

Answer:

inorganic

organic

inorganic

organic

inorganic

Explanation: trust me

How do the particles of a gas differ from the particles of a solid?

Answers

Answer:

Gas is more open particles

Explanation: gas can flow

Which substance should a student apply to the skin if he or she gets splashed with an acid?

Answers

First of all, you should be wearing proper PPE when handling acid, including a lab coat, large viton or butyl rubber gloves over nitrile gloves, apron, safety eye goggles (goggles!! not just safety glasses with an eyeshield), and face shield. You should be working in a fume hood with the sash closed in front of you as much as possible. This combination of engineering controls and PPE will help avoid a lot of big problems.

Why is a chemical equilibrium described as dynamic?

Answers

Answer:

Chemical equilibrium is also called as dynamic equilibrium because it in chemical equilibrium, the equilibrium can shift towards both sides that is reactant and product known as equilibrium shifting. And in chemical equilibrium, the reaction is going on but the rate of formation of reaction is equals to the rate of formation of product.

Hope this helps!

how many Atoms of chlorine Cl are there in 3.45 mol Cl?

Answers

Answer:

2.078x10^24

Explanation:

No. of atoms of chlorine = 3.45 x 6.022x 10 ^23 x 1

= 2.078x10^24

( to find no. of atoms of, heres the formula i was taught No. of atoms = no. of moles x Avogadros constant x no. of atoms in the formula of compound)

Will someone actually help me and not just something random

Answers

Answer:

D

Explanation:

how does atomic spectrum differ from continuous spectrum​

Answers

Answer:

A continuous spectrum is a record formed by collecting light of all frequencies traveling through space together. ... A line spectrum is a record formed by collecting light emitted from excited atoms whose electrons are falling back down to lower energy states.

Explanation:

At 25ºC, the average velocity of a hydrogen molecule is 1.92 x 103 m/s. What is the average velocity of a nitrogen molecule at the same temperature?
NEED WORK

Answers

Answer:

V = 513.36m/s

Explanation:

Temperature (T) = 25°C = (25 + 273.15) = 298.15K

Speed (V) = 1.92*10³m/s

According to kinetic theory of gases, the speed (v) of a molecule is

V= √(3RT / M)

V = speed or velocity

R = ideal gas constant = 0.082J/mol.K

T = temperature of the gas

M = molar mass

Molar mass of hydrogen molecule = 2.0g/mol

Molar mass of Nitrogen molecule = (2×14.0) = 28.0g/mol

Since they're in the same temperature

V1 / V2 = √(M2 / M1)

1.92×10³ / V2 = √(28 / 2)

1.92×10³ / V2 = √(14)

1.92*10³ / V2 = 3.74

1.92*10³ = 3.74V2

V2 = 1920 / 3.74

V2 = 513.36m/s

The velocity of Nitrogen molecule is 513.36m/s

A typical cell phone uses wavelength of 0.36meters. How much energy does this wave have?

Answers

Answer:

55×10^-26 J

Explanation:

We can calculate the energy of the wave from

E= hc/λ

Where

h= Planks constant = 6.6×10^-34 Is

c= speed of light = 3×10^8 ms-1

λ= wavelength of the wave = 0.36 metres

Recall that cell phone use radio waves which belong to the electromagnetic spectrum hence it must possess the speed of light.

E= 6.6×10^-34 × 3×10^8/ 0.36

E= 55×10^-26 J

Hence the energy possessed by 0.36 meters wavelength radio waves is 55×10^-26 J

1. Which gas will move faster through a small opening hydrogen or oxygen? *
A)hydrogen
B) oxygen

Answers

Hydrogen because oxygen gas will excuse 4 times slower than hydrogen gas !

Answer:

hydrogen

Explanation:

What kind of energy transformations occur when you hit a coconut with a hammer

Answers

sound energy, kinetic energy,

i cant think of any more but hope this helps

Answer:

Mechanical to kinetic to sound to heat

Explanation:

Remember that all types of energy transformation end in heat

Fossil fuels, like coal, oil, and natural gas, are huge, carbon-rich deposits that essentially trapped carbon for millions of years (until humans started burning them for energy).

True or False

Answers

Answer:

True!

Explanation:

Fossil fuels are carbon based compounds present deep in the earth left millions of years ago.

hope it helps!

CORO
Name three ways that scientists can ensure their results
are reliable

Answers

Answer:

Reliability. When a scientist repeats an experiment with a different group of people or a different batch of the same chemicals and gets very similar results then those results are said to be reliable. Reliability is measured by a percentage – if you get exactly the same results every time then they are 100% reliable.

Explanation:

Sorry, I only got one way.

how many moles of solute are present in 50.0 ml of 0.20 m kno3

Answers

Answer: Volume =  50.0 mL in liters : 50.0 / 1000 = 0.05 L

n = M x V

n = 0.20 x 0.05

n = 0.01 moles of solute

Explanation:

The number of moles of solute are present in 50.0 mL of 0.20 M of KNO₃ solution is 0.01 moles.

How do we calculate moles?

Moles will be calculated by using the molarity formula because molarity is define as the no. of moles of solute present in per liter of the solution as:

M = n/V, where

M = molarity of KNO₃ = 0.2 M

V = volume of solution = 50mL = 0.05L

Moles will be calculated as:

n = (0.2)(0.05) = 0.01 moles

Hence required moles are 0.01 moles.

To know more about molarity, visit the below link:
https://brainly.com/question/26528084

Choose the correct word to make an
appropriate hypothesis for this example.
If
is added to water, then the
boiling point of water increases because
solutions have
boiling points than pure liquids if
pressure remains unchanged.

Answers

Answer: salt , higher.

Explanation:

Doing it right now

Answer:

salt, higher

Explanation:

edge

B. If the sand you ran across has a specific-heat capacity of 835 J/(kgºc),
how much energy must be added to a 2-kilogram pile of it to increase its
temperature from 40°C to 50°C? Show your work. (3 points)

Answers

Answer: 16700 Joules

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

[tex]Q=m\times c\times \Delta T[/tex]

Q = Heat absorbed = ?

m = mass of sand = 2 kg

c = heat capacity = [tex]835J/kg^0C[/tex]

Initial temperature  = [tex]T_i[/tex] = [tex]40^0C[/tex]

Final temperature= [tex]T_f[/tex]  = [tex]50^0C[/tex]

Change in temperature ,[tex]\Delta T=T_f-T_i=(50-40)^0C=10^0C[/tex]

Putting in the values, we get:

[tex]Q=2kg\times 835J/kg^0C\times 10^0C[/tex]

[tex]Q=16700J[/tex]

16700 J of energy must be added to a 2-kilogram pile of it to increase its temperature from 40°C to 50°C

What does “moving slow” mean to a geologist?

Answers

The speeds of the processes revolving around earth

A landslide can be defined as a mass movement of material (e.g., rocks), which moves down a steep slope. A geologist is an expert that studies SLOW-MOVING landslides on a geological scale.

Landslides can occur suddenly or more slowly over long periods of time.

On a geological scale, landslides occur slowly so they are imperceptible to humans.

A geologist is a professional who investigates landslides on a geological scale, which is coarse on a human time-frame.

In conclusion, a geologist is a professional who investigates SLOW-MOVING landslides on a geological scale.

Learn more in:

https://brainly.com/question/5634603?referrer=searchResults

How much of this reactant should he order to make
sure he runs out of both reactants at the same
time? Round to the nearest hundredth and do not
round any of your work until the very end.
g of the limiting
He should uder
reactant.

Answers

Answer:

the answer is Fe2O3

Explanation:

The thermite reaction is described by the equation below: A welder has ... How much of this reactant should he order to make sure he runs out of both reactants at the same time? Round to the nearest hundredth and do not round any of your work until the very end. He should order Fe2O3 g of the limiting reactant.

Answer:

92.41g

Explanation:

_____________ is the energy stored because of its position or shape.

A. Potential energy
B. Kinetic energy
C. Thermal energy
D. Chemical energy

Answers

Answer:

Potential Energy is the energy stored because of its position or shape

Explanation:

identify as the following as an element or a compound. its not multiple choice a) NaCI b) AR d) 02 c) CH4 d) 02 e) CI​

Answers

Answer:

A. compound (NaCl)

B. element (note: it should be Ar. AR is not an element or compound.)

c. compound (CH4)

d. element (O2)

e. element (Cl)

Explanation:

Element is single and by its self. A compound is multiple elements put together.

Need help with these three pls!!!!!

Answers

True because

False

True
1) true , 2) false , 3) true

If the percent (mass/mass) for a solute is 16% and the mass of the solution is 400 g,
What is the mass of solute in solution

Answers

Answer:

[tex]m = 64\,g[/tex]

Explanation:

The mass of the solute is given by the following expression:

[tex]m = 0.16\cdot (400\,g)[/tex]

[tex]m = 64\,g[/tex]

List three facts or accomplishments of Modern India (India today)​

Answers

Answer:

India is one of the oldest countries in the world and is found in the Asian continent of the world.

They are known as the most populous country in the world.

They also have a greater linguistic diversity than any other large country. Lots of languages are available and accepted in the country.

They are very vast in Agriculture and accounts for 40percent of Mango production in the world

Explanation:

India is the largest producer. India is also the world's largest tea and spices producer. The country manufactures many pharmaceuticals, textiles, and electric goods that are used worldwide. More people in India have access to phones than to sewage systems.

Which of these would be an appropriate way to describe the concentration of orange candies? Check all that apply
the number of orange candies divided by total number of candies
the mass of orange candies divided by total mass of candies
the volume of brown candies divided by volume of orange candies
the actual number of orange candies
the number of orange candies divided by number of brown candies
the number of orange candies plus number of brown candies

Answers

Answer:

the number of orange candies divided by total number of candies

the mass of orange candies divided by total mass of candies

Explanation:

The two correct options that are appropriate to describe the concentration of orange candies would be the number of orange candies divided by total number of candies and the mass of orange candies divided by total mass of candies.

The concentration of a substance can be described as the fraction of that substance in a particular mix of substances.

In term of number, the concentration of a substance in a mix of substances can be expressed as the number of that substance divided by the total number of substances in the mix.

In term of mass, the concentration of a substance in a mix of substances can be expressed as the mass of that substance divided by the total mass of the mix.

Answer:

A, B, E

Explanation:

edge

what happens to the density of a box full of leaves if you crush up all the leaves and place them in another box

A the density increases

B the density stays the same

C the density decreases

D the density first decreases, then increases

Answers

Answer:

B the density stays the same

What is one thing NOT impacted by Acid
Rain.

A)Granite
B)Metal
C)Limestone

Answers

The answer is granite I think

which spheres are part of the earth system

Answers

Answer:

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).

Explanation:

Which of these Electromagnetic waves has the most kinetic energy and can be
dangerous?
O radio waves
O gamma rays
O ultraviolet waves
O visible light

Answers

Answer:

Gamma Rays.

Explanation:

Gamma-ray photons have the highest energy in the EMR spectrum and their waves have the shortest wavelength.

What is the pH of a 0.083 solution of HCI

Answers

Answer:

The pH is 1.08,  being an acid pH

Explanation:

pH is a parameter used to measure the degree of acidity or alkalinity of a substance. The pH scale ranges from 0 to 14. Values ​​less than 7 indicate the acidity range and those greater than 7 indicate alkalinity or basicity. Value 7 is considered neutral. Mathematically, pH is the negative logarithm of the molar concentration of hydrogen or proton ions (H⁺) or hydronium ions (H₃O⁺).

pH= - log [H⁺]= - log [H₃O⁺]

A strong acid is an acid that completely dissociates into hydrogen ions and anions in solution. This implies that the initial concentration of acid is equal to the final concentration of H₃O⁺. This occurs with acid HCl.

So,  pH is calculated as:

pH= - log (0.083)

pH= 1.08

The pH is 1.08,  being an acid pH

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