1 asapt

Question 1

what is atomic number

Answer 1

atomic number is the number of protons in an atoms nucleus

Question 2

what is mass number

Answer 2

protons and neutrons in an atoms nucleus

Question 3

isotopes

Answer 3

an atom of the same element with the same number of protons but a different number of neutrons in the nucleus

Question 4

relative isotopic mass

Answer 4

the mass of an atom of an isotope of an element compared to 1/12th the mass of an atom of a carbon-12 isotope

Question 5

relative atomic mass

Answer 5

the average mass of an atom of an element compared to 1/12th the average mass of an atom of a carbon-12 isotope.

Question 6

relative molecular mass

Answer 6

sum of relative atomic masses of all atoms in molecular formula

Question 7

relative formula mass

Answer 7

sum of relative atomic masses of all atoms in its formula

Question 8

ionisation energy

Answer 8

the energy required to remove one mole of electrons from one mole of gaseous atoms, or ions from an element

Question 9

electron shielding

Answer 9

effect of inner electrons which reduce nuclear pull on outer shell electrons

Question 10

atomic orbital

Answer 10

A region in space around the nucleus of an atom in which there is a 95% chance of finding an electron

Question 11

orbital sub divisions

Answer 11

s - 1 orbital, circle
p - 3 orbitals, dumbell
d - 5 orbitals
f - 7 orbitals