ions, isotopes, Ar

Question 1

when do ions form

Answer 1

when atoms/groups of atoms lose or gain electrons

Question 2

Negative ions form when atoms _____ electrons

Answer 2

gain

Question 3

Positive ions form when they _____ electrons

Answer 3

lose

Question 4

what are isotopes

Answer 4

different forms of the same element which have the same number of protons but different number of neutrons

Question 5

what is the formula for working out the Ar of an element

Answer 5

Ar =
(isotope abundance times isotope mass number) + (isotope abundance times isotope mass number) divided by sum of abundances of all the isotopes
(abundances are %)

Question 6

metals lose electrons to get a full outer shell and forms ions with a _________ charge

Answer 6

loses, positive

Question 7

non metals _______ electrons to get a full outer shell and forms ions with a _________ charge

Answer 7

gains, negative