Fall Semester Final Dec 19 & 20

Chemistry is the study of:

• matter

• properties of matter

• changes that matter undergoes

• all of the other answers are correct

What are the fundamental building blocks of matter that retain specific physical and chemical properties?

• mixtures

• elements

• compounds

Color, density, texture, melting point, freezing point, boiling point, and temperature:

• are all physical properties

• are all chemical properties

Flammability, combustibility, ability to decompose, ability to synthesize, to go through a replacement (substitution) reaction all address the ability to produce a new chemical substance. They are all:

• physical properties

• chemical properties

Which of the following is true about physical and chemical changes of matter?

• Physical changes involve a change in composition (formula, type) of substance

• Chemical changes are typically easier to reverse than physical changes

• Chemical changes produce a new substance

When a chemical goes through a chemical change, there is always one or more physical changes also occurring:

• true

• false

Which of the following are indicators or hints of a chemical change?

• new color

• new heat and light

• new gas

• new solid

• all of the above

What is the subatomic particle that determines the type of atom?

• nucleus

• proton

• neutron

• electron

• ion

Mass number is calculated by counting the number of:

• protons

• neutrons

• electrons

• protons plus neutrons

• protons plus electrons

What is true about isotopes?

• They are different elements with a different number of protons.

• They always have the same mass with the same number of neutrons.

• They are equally abundant in nature with the same number of neutrons.

• They are the same element with a different number of neutrons.