Which of the following atoms has sixvalence electrons? A. sulfur (S)
B. silicon (Si)
C. magnesium (Mg)
D. argon (Ar)

If equal masses of the listed metals were collected , which would have a greatest volume ? a. aluminum 2.70,b.zinc7.14,c.copper 8.92,d.lead 11.34

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.