Atomic theory 6

Question 1

definition of first ionisation energy

Answer 1

the minimum amount of energy required to remove the first most loosely bound electron from a mole of isolated atoms of an element in its neutral gaseous ground state

Question 2

ionisation energy across a period

Answer 2

increase (log book)

Question 3

why does ionisation energy increase across a period

Answer 3

increase in nuclear charge and no extra screening

decrease in atomic radius

Question 4

ionisation energy down a group

Answer 4

decrease (log book)

Question 5

why does ionisation energy decrease down a group

Answer 5

increase in atomic radius (extra shells)

extra screening of nuclear attraction

Question 6

3 things that ionisation energies depend on (graph), in order

Answer 6

atomic radius
sublevel stability
energy level stability

Question 7

which elements have the highest ionisation energy

Answer 7

noble gases

Question 8

which elements have the lowest ionisation energy

Answer 8

alkali metals

Question 9

most stable sublevel

Answer 9

full

Question 10

second most stable sublevel

Answer 10

half-full

Question 11

to get second ionisation energy

Answer 11

remove electron from ion

Question 12

equation to show successive ionisation energies

Answer 12

X+ (g) -> X+2 (g) + e-