Atomic Trends

Question 1

what is the trend to do with atomic radius

Answer 1

AR decreases as you move acorss a period and increases as you move down the groups

Question 2

what is the reason behind this trend of atomic radius

Answer 2

decreasing: across a period electrons are added but only to the one shell this means that protons have stronger attraction the shell because there are more protons and still the same shell
increasing: going down the groups new shells are added which means protons are further away and pull in less

Question 3

what is ionization energy

Answer 3

the energy required to remove outer most electrons from one mol of an atom in gas phase

Question 4

what is the trend to do with ionization energy

Answer 4

IE increases across a period and decrease down the groups

Question 5

what is the reason behind this trend of ionization energy

Answer 5

the number of protons increases but electrons are being added to the same shell. electrons are attracted more strongly therefore more energy is required to remove them

Question 6

what is electronegativity

Answer 6

the atoms ability to attract electrons from other atoms

Question 7

what is the trend to do with electronegativity

Answer 7

EN increases across a period and decreases down the group

Question 8

what is the reason behind this trend of electronegativty

Answer 8

due to the strong pull of positive nucleus, atoms further along the period can attract electrons more strongly, also on left they are making cation

Question 9

what is core charge

Answer 9

attractive force of nucleus on the valence electrons (protons - inner shell electrons)

Question 10

what is the trend to do with core chagre

Answer 10

CC increases across period and stays the same down the group