Periodicity

Question 1

Whatis periodicity

Answer 1

The trends in a periodic tabke

Question 2

What are in the ffg groups:
Group 1 
Group 2 
Group 3-12
Group 17 
Group 18

Answer 2

1 alkali metals
2 alkali earth metals 
3-12 transition elemnets 
17 halogens 
18 noble gases

Question 3

What is the atomic radius

Answer 3

Distance from centre of atom to outermost shell

Question 4

Why does electron affinity increase across a period

Answer 4

Protons increase in the nucleus resulting in a more positive charge, atomic radius decreases therefore there is a stronger electrostatic force of attraction for the bond pair

Question 5

Why does ionization energy increase across a period

Answer 5

Atomic radius decrease which cause electrons to be closer to the nucleus resulting in a greater electrostatic force requiring more energy to be used to remove electrons

Question 6

Why does electronegativity decrease down a group

Answer 6

Atomic radius increases resulting in electrons being further from the nucleus and the spaces between the electrons amid the nucleus to increase this means that there is a weaker pull and the electronegativity decreases

Question 7

Why does ionization energy decrease down a group

Answer 7

The atomic radius increases resulting in the spaces between the nucleus and electrons to increase therefore the electrostatic force of attraction is weaker and less energy is required to remove and electron