Question 1

Which of the following statements best describes a heterogeneous mixture?

Accepted Answer

It consists of substances that are not uniformly distributed, and the different components can be visually distinguished.

Question 2

A student is given a sample of an unknown metal. The sample has a mass of 45.0 g and displaces 16.0 mL of water in a graduated cylinder. What is the density of the metal?

Accepted Answer

$$\frac{45.0\ \mathrm{g}}{16.0\ \mathrm{mL}} = 2.81\ \mathrm{g/mL}$$

Question 3

Which of the following is a physical property?

Accepted Answer

Melting point

Question 4

Which group on the periodic table contains the noble gases?

Accepted Answer

Group 8A

Question 5

A compound is defined as:

Accepted Answer

A substance composed of two or more elements chemically combined in fixed proportions.

Question 6

Which of the following best describes the difference between a chemical change and a physical change?

Accepted Answer

A chemical change produces one or more new substances with different properties, while a physical change does not alter the chemical composition.

Question 7

Which of the following elements is a transition metal?

Accepted Answer

Iron (Fe)

Question 8

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Salt dissolved in water

Question 9

Which of the following is NOT a state of matter?

Accepted Answer

Density

Question 10

Which of the following is the correct chemical symbol for potassium?

Accepted Answer

K

Question 11

Which of the following statements about metals is TRUE?

Accepted Answer

Metals are usually shiny, malleable, and good conductors of heat and electricity.

Question 12

Which of the following is a chemical property?

Accepted Answer

Ability to rust

Question 13

A student mixes vinegar and baking soda, producing bubbles and a new substance. This is an example of:

Accepted Answer

A chemical change

Question 14

Which of the following is the best definition of density?

Accepted Answer

The amount of mass in a given volume.

Question 15

Which of the following is a property of nonmetals?

Accepted Answer

Poor conductor of heat and electricity

Question 16

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

Accepted Answer

Melting of ice

Question 17

Which of the following best describes the periodic table?

Accepted Answer

A chart that organizes elements by increasing atomic number and groups elements with similar properties.

Question 18

Which of the following is a heterogeneous mixture commonly found in medical settings?

Accepted Answer

Blood

Question 19

Which of the following is the correct formula for calculating density?

Accepted Answer

$$\mathrm{Density} = \frac{\mathrm{Mass}}{\mathrm{Volume}}$$

Question 20

Which of the following is a chemical change that occurs in everyday life?

Accepted Answer

Digestion of food in the stomach

GOB Chemistry Study Guide: Atomic Structure, Periodic Table, and Properties of Matter

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