Cm
KH Dm
L
g
6.8 cm = [?] hm
=
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The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

How much would you need to weigh out in order to have 0.2moles of magnesium atoms?

Neutral atoms of argon, atomic number 18, have the same number of electrons as each of the following items except: cl- s -2 k+ ca +2 ne