Which statements are true?
(a) Neutrons have neither mass nor charge.
(b) Isotopes of an element have an identical number of protons.
(c) C-14 and N-14 have identical neutron/proton (n/p+) ratios.
(d) The vertical columns in a periodic table are referred to as “groups.”
(e) When an atom loses an electron, it becomes positively charged.
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