b. 0.948 g/cm3
c. 9.482 g/cm3
d. 0.105 g/cm3
9. How many protons and electrons are in a hydrogen atom?
a. 1 proton, 1 electron
b. 1 proton, 2 electrons
c. 2 protons, 0 electrons
d. 0 protons, 1 electron
10. On the Periodic Table of Elements, what does the number in the top of each box represent?
a. Number of protons, electrons and neutrons in an atom
b. Number of electrons
c. Number of protons found in the nucleus of an atom
d. Average atomic mass
11. What is the atomic mass of gold?
a. 169.58632
b. 203.65664
c. 196.966569
d. 79
12. The law of conservation of mass states that
a. Matter is always conserved
b. The total amount of matter in the universe remains constant
c. Both A and B
d. None of the above
13. An ion is a charged particle that is formed when
a. An atom gains electrons
b. An atom loses electrons
c. Both A and B
d. None of the above