Chemistry: finding Protons, Neutron, Electron, PLEASE HELP?

1) Calculate the mass of a neutral deuterium atom. Use the following:: 1 proton = 1.6726 X 10 ^ -24 g 1 neutron= 1.6749 X 10 ^ -24 g 1 electron= 9.1094 X 10 ^ -28 g -------------------------------------------------------------------------- 2) write the symbols for the atom or... show more 1) Calculate the mass of a neutral deuterium atom. Use the following::
1 proton = 1.6726 X 10 ^ -24 g
1 neutron= 1.6749 X 10 ^ -24 g
1 electron= 9.1094 X 10 ^ -28 g
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2) write the symbols for the atom or ion with each of the following set of subatomic particle:::

a) 17p, 18 n, 16 e
b) 17p, 18n, 17 e
c) 17p, 20n, 18e

(p = proton, n=neutron, e=electrons
5 answers 5