periodicity

Question 1

What is the definition of periodicity?

Answer 1

Periodicity is the repeating pattern of chemical or physical properties going across the periods.

Question 2

What is the meaning of the classification of elements in the s,p, and d blocks?

Answer 2

They are arranged according to which orbitals have the highest energy electrons are in.

Question 3

What is the atomic radius?

Answer 3

The distance between the nucleus and the outermost electron in the atom.

Question 4

What are the patterns of atomic radius?

Answer 4

Atomic radius decreases from left to right, due to the increased number of protons that increase positive attraction for electrons that are in the same shell with similar shielding.

Question 5

In the 1st ionisation energies does it increase or decrease?

Answer 5

The general trend increases.

Question 6

In the 1st ionisation energy, why does it increase?

Answer 6

This is due to the increasing number of protons as the electrons are being added to the same shell.

Question 7

What groups are in each block?

Answer 7

s-block = groups 1 and 2
p-block = groups 3 and 0
d-block = transition metals
f-block = radioactive elements

Question 8

What happens to atomic radius down a period?

Answer 8

Down a group, the atomic radius increases. As an electron shell is being added every time.This increases the distance between the nucleus and the outer electrons, reducing the e power of attraction.