ions, atoms and isotopes

Question 1

define ‘relative atomic mass (Ar)’

Answer 1

the average relative mass of the isotopes of an element compared with the standard carbon atom (¹²C).

Question 2

Ar formula

Answer 2

Ar=(mass of first isotope × % of first isotope) + (mass of second isotope x % of second isotope) / 100
Ar=(%1 x Ar1) + (%2 x Ar2) / 100

Question 3

Metals lose (sub-atomic particle)

Answer 3

Metals lose electrons (“metals are losers”)