Questions 13–16
Questions 17–19
12 . Solid → Gas
(A) Proton
(B) Neutron
(C) Electron
(D) Isotope
(E) Ion
13 . Neutral charge; 1 amu
14 . Positive charge
15 . Negligible weight
16 . Negative charge; pairs with opposite spin
(A) K
(B) As
(C) Be
(D) Se
(E) Ir
17 . Metalloid