Answer:Answer: D. silicon
: The electron dot diagram is a diagram that represents the valence electrons of the element as dots.
A. Chlorine: has atomic number of 17 and has 17 electrons. The electronic configuration is:
Thus it has 7 valence electrons.
B. Magnesium: has atomic number of 12 and has 12 electrons. The electronic configuration is:
Thus it has 2 valence electrons.
C. Phosphorous: has atomic number of 15 and has 15 electrons. The electronic configuration is:
Thus it has 5 valence electrons.
D. Silicon: has atomic number of 14 and has 14 electrons. The electronic configuration is:
Thus it has 4 valence electrons.
E. Sulfur: has atomic number of 16 and has 16 electrons. The electronic configuration is:
Thus it has 6 valence electrons.
