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3 years ago

Which is the largest atomic radius

Chemistry

1 answer:

katrin2010 [14]3 years ago

7 0

Answer:

₁₁A

Explanation:

Atomic radius

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons.

This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases.

So in given elements consider A₁₁, B₁₂, C₁₃ ans D₁₇ as sodium, magnesium, aluminium and chlorine. This is the third period and as we move form sodium to chlorine atomic radius decreases. That's why sodium has greater size.

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased

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Consider the following standard reduction potentials in acid solution: The weakest reducing agent listed above is Co Cr Cr3 Mn2

Sliva [168]

This is an complete question, here is a complete question.

Consider the following standard reduction potentials in acid solution:

$Cr^{3+}+3e^-\rightarrow Cr$ $E^o=-0.74V$

$Co^{2+}+2e^-\rightarrow Co$ $E^o=-0.28V$

$MnO_4^-+8H^++5e^-\rightarrow Mn^{2+}+4H_2O$ $E^o=+1.51V$

The weakest reducing agent listed above is:

(a) $Cr^{3+}$

(b) $Cr$

(d) $MnO_4^-$

Answer : The correct option is, (d) $MnO_4^-$

Explanation :

As we know that,

The substance having highest positive $E^o$ potential will always get reduced and will undergo reduction reaction and weakest reducing agent or strongest oxidizing agent.

From the standard reduction potentials we conclude that,

$MnO_4^-$ having highest positive $E^o$ potential than the other. So, it will always get reduced and will undergo reduction reaction and weakest reducing agent.

Hence, the correct option is, (d) $MnO_4^-$

7 0

3 years ago

Starting with 9.3 moles of O2, how many moles of H2S will be needed and how many moles of SO2 will be produced in the following

tensa zangetsu [6.8K]

Answer: The amount of hydrogen sulfide needed is 6.2 moles and amount of sulfur dioxide gas produced is 6.2 moles

Explanation:

We are given:

Moles of oxygen gas = 9.3 moles

The chemical equation for the reaction of oxygen gas and hydrogen sulfide follows:

$2H_2S+3O_2\rightarrow 2SO_2+2H_2O$

For hydrogen sulfide:

By Stoichiometry of the reaction:

3 moles of oxygen gas reacts with 2 moles of hydrogen sulfide

So, 9.3 moles of oxygen gas will react with = $\frac{2}{3}\times 9.3=6.2mol$ of hydrogen sulfide

For sulfur dioxide:

By Stoichiometry of the reaction:

3 moles of oxygen gas produces 2 moles of sulfur dioxide

So, 9.3 moles of oxygen gas will produce = $\frac{2}{3}\times 9.3=6.2mol$ of sulfur dioxide

Hence, the amount of hydrogen sulfide needed is 6.2 moles and amount of sulfur dioxide gas produced is 6.2 moles

7 0

3 years ago

‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️ Is this right? If not which is it pls

Len [333]

Answer:

i believe it is b as well

Explanation:

6 0

3 years ago

Four forces are exerted on each of the two objects shown below:

zzz [600]

Answer:

A: Object A will move in the up direction. But not object B

Explanation:

It will move in the up direction because object A has an unbalanced force. For the up direction there, it is 6 newtons and for the bottom direction, it is 2 newtons. For the right and left direction, both of them are 3 newtons. So object A will move in the up direction because it has the most newtons(which is 6).

For Object B, it is unbalanced too. But object B will move to the right because it is 2 newtons there and there is one newton on the left. Furthermore, the up and down directions are 3 newtons. So they are balanced and will cancel out. Therefore, object A will move in the right direction because it has the most newtons(which is 3).

So the final answer is object A. Hope it helped!

4 0

3 years ago

What is a "whale fall"

ira [324]

Answer:

its where a whale has died and the carcass of the whale sinks to the depth of the oceanic floor.

:) hope that helps

Explanation:

7 0

3 years ago