Question

1. choose the best answer. (see companion material, the periodical table, attached.)

how many energy levels does xe have?
5
1
3
8

1. choose the best answer. (see companion material, the periodical table, attached.)

how many total electrons does si have?
3
4
28
14

Explanation:

• For the first question about Xe (Xenon): In the periodic table, the period number indicates the number of energy levels. Xenon is in period 5, so it has 5 energy levels.
• For the second question about Si (Silicon): The atomic number of an element is equal to the number of protons and in a neutral atom, it is also equal to the number of electrons. Silicon has an atomic number of 14, so it has 14 electrons.

Answer:

1. 5
2. 14