trends in periodic table

Question 1

definition of covalent radius

Answer 1

size of an atom

half the distance between two nuclei

Question 2

what happens to the covalent radius/ionic radius across a period

Answer 2

decrease

nuclear charge increase

Question 3

what happens to the covalent radius/ionic radius down a group

Answer 3

increases
electron shells increase
shielding effect

Question 4

definition of electronegativity

Answer 4

measure of attraction for electrons in a bond

Question 5

what happens to the electronegativity across a period

Answer 5

increased

nuclear charge increase

Question 6

what happens to the electronegativity down a group

Answer 6

decreases

electron shells increases

Question 7

definition of ionisation energy

Answer 7

nery required to remove one mole of electrons from one mole of gaseous atoms

Question 8

what happens to the ionisation energy across a period

Answer 8

increases

nuclear charge increases

Question 9

what happens to the ionisation energy down a group

Answer 9

decreases

shielding effect and shells