Question

1. use the partial periodic - table to answer the question. what is true about the element silicon (si)? silicon has 2 more valence electrons than magnesium (mg). silicon has 8 more valence - electrons than carbon (c). silicon has the same number of valence electrons as its atomic number. silicon has the same number of valence electrons as the other elements in its same period.

Explanation:

Step1: Recall valence - electron rules

Elements in the same group have the same number of valence electrons. Carbon (C) and silicon (Si) are in Group 14, so they have the same number of valence electrons (4). Magnesium (Mg) is in Group 2 and has 2 valence electrons, while Si has 4 valence electrons, so Si has 2 more valence electrons than Mg.

Answer:

Silicon has 2 more valence electrons than magnesium (Mg).