Question 1

Which experiment provided evidence for the existence of the nucleus in the atom?

Accepted Answer

Rutherford gold foil experiment

Question 2

According to Dalton’s atomic theory, which statement is FALSE?

Accepted Answer

Atoms are created and destroyed in chemical reactions.

Question 3

Which law states that the total mass of substances before and after a chemical reaction is the same?

Accepted Answer

Law of conservation of mass

Question 4

A compound contains 40 g of A and 60 g of B. In another sample, it contains 20 g of A and 30 g of B. Which law does this illustrate?

Accepted Answer

Law of constant composition

Question 5

Which particle has a charge of +1 and a mass of approximately 1 amu?

Accepted Answer

Proton

Question 6

What is the atomic number of an element with 17 protons?

Accepted Answer

$$17$$

Question 7

Which isotope of carbon has 6 protons, 6 electrons, and 8 neutrons?

Accepted Answer

$$^{14}C$$

Question 8

Calculate the atomic weight of chlorine given the following data: $$^{35}Cl ($$mass = $$34.969$$ amu, abundance = $$75.78	ext{	ext{ %}}$$), $$^{37}Cl ($$mass = $$36.966$$ amu, abundance = $$24.22	ext{	ext{ %}}).$$

Accepted Answer

$$35.45$$ amu

Question 9

Which element is a metalloid?

Accepted Answer

Silicon

Question 10

Which group in the periodic table contains the noble gases?

Accepted Answer

Group 8A

Question 11

Which of the following is a diatomic molecule that occurs naturally?

Accepted Answer

Oxygen ($$O_2)$$

Question 12

What is the empirical formula for glucose ($$C_6H_{12}O_6$)?

Accepted Answer

$$CH_2O$$

Question 13

Which ion is formed when sodium loses one electron?

Accepted Answer

$$Na^+$$

Question 14

What is the correct formula for magnesium nitride, given the charges $$Mg^{2+}$$ and $$N^{3-}$$?

Accepted Answer

$$Mg_3N_2$$

Question 15

Which acid is formed from the nitrate ion ($$NO_3$$^-$$)?

Accepted Answer

Nitric acid

Question 16

What is the name of $$CO_2$$ according to binary molecular compound nomenclature?

Accepted Answer

Carbon dioxide

Question 17

Which prefix is used to indicate four atoms in a binary molecular compound?

Accepted Answer

Tetra-

Question 18

What is the structural difference between 1-propanol and 2-propanol?

Accepted Answer

The $$-OH$$ group is attached to different carbon atoms.

Question 19

Which compound is an alkane?

Accepted Answer

Propane ($$C_3H_8)$$

Question 20

Which of the following is a polyatomic ion?

Accepted Answer

Sulfate ($$SO_4$$^{2-}$$)

Atoms, Molecules, and Ions: Foundations of Modern Chemistry (CH:2)

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