Choose the 2 correct statements. explain
a
Silicon is located in Group 3A, Period 4.
b
Silicon is located in Group 4A, Period 3.
c
Silicon has 3 valence electrons. The valence electrons are located in the 4th energy level.
d
Silicon has 4 valence electrons. The valence electrons are located in the 3rd energy level.
The correct statements are:
c) Silicon has 3 valence electrons. The valence electrons are located in the 4th energy level.
d) Silicon has 4 valence electrons. The valence electrons are located in the 3rd energy level.
Explanation:
Statement c is correct because silicon is in Group 4A of the periodic table and it has 4 valence electrons. The valence electrons are the electrons in the highest energy level, which for silicon is the 3rd energy level.
Statement d is also correct because silicon is in Period 3 of the periodic table. The period number indicates the number of energy levels occupied by the electrons in an element, so silicon's valence electrons, located in the 3rd energy level, match with the period number.