01. Atomic Structure Key Words

Question 1

nucleons

Answer 1

a subatomic particle with a relative mass of 1, which resides in the nucleus of an atom

Question 2

mass number

Answer 2

the total number of protons and neutrons (nucleons) in an atom

Question 3

isotopes

Answer 3

atoms of the same element with the same number of protons but different numbers of neutrons, for instance Carbon-12 and Carbon-14 both have 6 protons, but Carbon-12 has 6 neutrons and Carbon-14 has 8

Question 4

atomic number

Answer 4

the number of protons in an atom

Question 5

relative atomic mass

Answer 5

the weighted mean mass of an atom of an element compared to the mass of 1/12 of the mass of an atom of Carbon-12

Question 6

weighted mean

Answer 6

a mean which takes into account the abundance or prevalence

Question 7

relative isotopic mass

Answer 7

the mass of an atom in an isotope compared to the mass of 1/12 of the mass of an atom of Carbon-12

Question 8

unit of relative atomic mass

Answer 8

g/mol

Question 9

first ionisation energy

Answer 9

the energy required to remove one mole of electrons from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions

Question 10

what is IE measured in

Answer 10

kJ/mol

Question 11

second ionisation energy

Answer 11

the energy required to remove one mole of electrons from each atom in one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions

Question 12

relative formula mass

Answer 12

the weighted average of the mass of all of the masses in the formula compared to the mass of 1/12 of the mass of an atom of Carbon-12