Which igneous rock makes up much of the moon's surface? a. gneiss b. basalt c. shale d. limestone

What semimetal can form four single covalent bonds.

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.