Periodicity

Question 1

what are special about groups in periodic table

Answer 1

same properties

same outer electron number

Question 2

how does reactivity effect periodic table

Answer 2

• s block is more reactive going down

- transition elements are unreactive

Question 3

what are special about periods in the periodic table

Answer 3

same number of shells

Question 4

in period 3 what groups lose their outer electrons and why

Answer 4

123 all giant structures

Question 5

what is the trend across period 3

Answer 5

groups 123 are metallically bonded so increases, 4 giant macro molecular structures and 567 are molecular covalent bonds and bigger vvw force is the higher the melting point

Question 6

what is special about atomic radii

Answer 6

tells us about the size of the atom

Question 7

why does the radii decrease across a period

Answer 7

protons are added to the nucleus and electrons to the outer main level,which pulls electrons closer to the nucleus.

Question 8

why does the radii increase down a group

Answer 8

have one extra complete main level shell

Question 9

why does the first ionization energy increase across a period

Answer 9

number of protons increase in nucleus and the main level shell gains an electron which increase the charger therefore harder to remove

Question 10

why does the first ionisation decrease down a group

Answer 10

the outer electron is further away from nucleus therefore less attracted

Question 11

why is there a drop from one period to the next in ionization

Answer 11

a new main level starts and so there is an increase in atomic radius