1. Emissions of light of a characteristic color from atoms during flame tests result directly from:____ .
Answers.
(A) a transition from a lower electron energy level to a higher energy level.
(B) a transition from a higher electron energy level to a lower energy level.
(C) a transition of an electron into the nucleus of the atom.
(D) little electrons with colored flashlights.

2. Cations are ______ charged, and anions are ______ charged.
Answers.
(A) positively, (B) negatively, (C) not, (D) highly, (E) lowly, (F) hyper, (G) under.

3. Write the complete electronic configuration for the following:
Answer.

Ne

Be

Ga

Sr²⁺