Question

1. choose the best answer. (see companion material, the periodical table, attached.) how many total electrons does si have? 3 28 4 14 15) choose the best answer. (see companion material, the periodical table, attached.) which element has 2 valence electrons? pu ca mt ss

Explanation:

Step1: Find Si's atomic number

Silicon (Si) has an atomic number of 14. For a neutral atom, total electrons = atomic number.

Step2: Match element to valence electrons

Calcium (Ca) is in Group 2 of the periodic table, so it has 2 valence electrons.

Answer:

1. D. 14
2. B. Ca