All categories

3 years ago

What occurs as the atomic number of the elements in Period 2 increases?

Chemistry

1 answer:

solmaris [256]3 years ago

3 0

Answer:

3)The nuclear charge of each successive atom increases, and the atomic radius decreases

Explanation:

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 and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.

You might be interested in

ANSWER FAST PLEASE!<br> Balance the following equation:<br> __Hg + __O₂ --> __HgO

ICE Princess25 [194]

Answer:

4Hg+2O2=4HgO

four Mercury + four oxygen

3 0

3 years ago

What’s the physical properties of a molecular solid, in regards to its physical properties of formation?

Anastasy [175]

It has a fixed mass
it does not change with the shape of the container
it cannot be compressed
it has fixed atom and molecules and limited to very small displacement
only vibrational motion occur in the molecules of solid .

7 0

3 years ago

Speed of an electron to orbit radius wire linear charge density is _________

ch4aika [34]

Answer:

A long uniformly charged wire has charge density λ=0.16μλ=0.16μC/m.

7 0

3 years ago

What is the mass of 5 mole of ammonia . Calculate the number of NH₃ molecules, nitrogen atom and hydrogen atoms in it..

Aloiza [94]

Molar mass of NH_3

$\\ \sf\longmapsto 14u+3(1u)$

$\\ \sf\longmapsto 14u+3u$

$\\ \sf\longmapsto 17g/mol$

We know.

No of moles=Given mass/Molar mass

$\\ \sf\longmapsto Given\;Mass=17(5)$

$\\ \sf\longmapsto Given \:Mass\:of\:NH_3=85g$

Now

Lets write the balanced equation

$\\ \sf\longmapsto N_2+3H_2=2NH_3$

There is 2moles of Ammonia
3moles of H_2
1mole of N_2

Now

$\boxed{\sf No\:of\:Molecules =No\:of\;moles\times Avagadro\:no}$

For Hydrogen

$\\ \sf\longmapsto 3\times 6.023\times 10^{23}$

$\\ \sf\longmapsto 18.069\times 10^{23}$

$\\ \sf\longmapsto 1.8\times 10^{22}molecules$

For Ammonia

$\\ \sf\longmapsto 2\times 6.023\times 10^{23}$

$\\ \sf\longmapsto 12.046\times 10^{23}$

$\\ \sf\longmapsto 1.2\times 10^{22}molecules$

For Nitrogen

$\\ \sf\longmapsto 1\times 6.023\times 10^{23}$

$\\ \sf\longmapsto 6.023\times 10^{23}molecules$

3 0

3 years ago

What can happen when chlorine is left in drinking water

lawyer [7]

Chlorine is used in swimming pools to kill unwanted bacteria and keep swimmers safe from infections and disease from the water. While there isn't enough chlorine in swimming pools to cause permanent damage, it can leave your hair dry and your skin irritated and red.

4 0

3 years ago