Question 1

Which of the following statements best represents a hypothesis according to the scientific method?

Accepted Answer

If salt is added to water, then the boiling point will increase.

Question 2

Convert $$4.56 	imes 10^3$ to expanded notation.

Accepted Answer

$$4560$$

Question 3

Which of the following is the correct scientific notation for 0.00032?

Accepted Answer

$$3.2 	imes 10$$^{-4}$$

Question 4

Which of the following is the largest value?

Accepted Answer

$$2500$$

Question 5

How many significant figures are in the measurement 0.004560?

Accepted Answer

4

Question 6

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

Accepted Answer

Water boiling to form steam

Question 7

A sample of metal has a mass of 45.0 g and a volume of 15.0 mL. What is its density?

Accepted Answer

$$3.0 \ \mathrm{g/mL}$$

Question 8

Which of the following is a heterogeneous mixture?

Accepted Answer

Sand and iron filings

Question 9

Which group in the periodic table contains the noble gases?

Accepted Answer

Group 8A

Question 10

How many protons, neutrons, and electrons are in $$_{17}^{37}\mathrm{Cl}$$?

Accepted Answer

17 protons, 20 neutrons, 17 electrons

Question 11

Which of the following best describes an ionic bond?

Accepted Answer

A bond formed by transferring electrons from a metal to a nonmetal

Question 12

What is the chemical formula for the ionic compound formed between magnesium and chlorine?

Accepted Answer

$$\mathrm{$$MgCl_2$$}$$

Question 13

Which of the following is a polyatomic ion?

Accepted Answer

$$\mathrm{SO_4$^{2-}}$$

Question 14

Which of the following elements is a metalloid?

Accepted Answer

Silicon

Question 15

Which of the following best describes nuclear fusion?

Accepted Answer

The combination of two light nuclei to form a heavier nucleus

Question 16

Which of the following is the correct symbol for a beta particle?

Accepted Answer

$$\beta$$

Question 17

Which of the following compounds is a molecular compound?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 18

Arrange the following elements in order of increasing atomic size: Li, Na, K.

Accepted Answer

Li \u003c Na \u003c K

Question 19

Which of the following intermolecular forces is the strongest?

Accepted Answer

Hydrogen bonding

Question 20

A radioactive isotope has a half-life of 3 days. If you start with 80 mg, how much remains after 9 days?

Accepted Answer

10 mg

GOB Chemistry Study Guide: Chapters 1–6

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