Chapter 8 - Periodicity

Question 1

what do the blocks on the periodic table indicate

Answer 1

the orbital that the highest energy electron can be found in

Question 2

what is the p-block characterized by

Question 3

why do the radii of atoms decrease across a period

Answer 3

the nuclear charge increases across a period while the shielding stays roughly the same, therefore the electrons experience a greater attraction to the nucleus and the atomic radius decreases

Question 4

why does first ionisation energy increase across a period

Answer 4

As you go across a period from left to right, the number of protons
in the nucleus increases but the electrons enter the same main level,
The increased charge on the nucleus means that it gets increasingly difficult to remove an electron.