deffinitions

Question 1

Define first ionisation energy

Answer 1

The first ionisation energy is the enthalpy change when one mole of gaseous
atoms forms one mole of gaseous ions with a single positive charge

Question 2

Define second ionisation energy

Answer 2

The second ionisation energy is the enthalpy change when one mole of
gaseous ions with a single positive charge forms one mole of gaseous
ions with a double positive charge

Question 3

Define mole

Answer 3

The mole is the amount of substance in grams that has the same
number of particles as there are atoms in 12 grams of carbon-12.

Question 4

Define relative atomic mass

Answer 4

Relative atomic mass is the average mass of one atom
compared to one twelfth of the mass of one atom of carbon-12

Question 5

Define relative molecular mass

Answer 5

Relative molecular mass is the average mass of a molecule
compared to one twelfth of the mass of one atom of carbon-12