Final exam practice questions

The difference between C12 and C14 is:

• C14 has more electrons

• C14 has more neutrons

• C14 has more protons

• C12 is two years younger

Which of the following isotopes has the same number of protons as C12?

• N14

• O16

• C13

• H2

Which of the following are signs of a chemical reaction?

• Production of odor

• Shiny luster

• Melting

• Condensation

Which of the following is an example of a physical change?

• Rusting of iron

• Burning of wood

• Melting of ice

• Cooking an egg

Which are physical properties:

• Changing color

• Producing a new odor

• An objects color and oder

• Formation of a precipitate

Has definite volume and takes the shape of it's container:

• Solid

• Liquid

• Gas

• Plasma

Subatomic particle that has no charge

• Proton

• Neutron

• Electron

If 90 grams of lead has a volume of 7.9 ml, what is it's density?

• 711 g/ml

• 180 g

• 11.4 g/ml

• 45.3 g/ml

If you were to compare two group 7 elements, Fluorine and Chlorine, one similarity is that they both:

• Have the same atomic number

• Have the same mass number

• Have the same total electrons

• Have the same valence electrons

If you were to compare two group 7 elements, Fluorine and Chlorine, one difference is that they:

• Chlorine has more protons but less mass

• Fluorine has less protons and less mass

• Florine has more valence electrons