Question 1

Which of the following statements best describes the Law of Multiple Proportions?

Accepted Answer

If two elements form more than one compound, the masses of one element that combine with a fixed mass of the other are in the ratio of small whole numbers.

Question 2

Which experiment led to the discovery of the nucleus in the atom?

Accepted Answer

Rutherford gold foil experiment

Question 3

What is the correct formula for the ionic compound formed between magnesium and nitrogen?

Accepted Answer

$$\mathrm{Mg_2N_3}$$

Question 4

Which of the following is NOT a postulate of Dalton’s atomic theory?

Accepted Answer

Atoms are indivisible and cannot be broken down into smaller particles.

Question 5

A sample of chlorine gas contains two isotopes: $$^{35}\mathrm{Cl} (75.8$$%) and $$^{37}\mathrm{Cl} (24.2$$%). What is the average atomic mass of chlorine? (Use: $$^{35}\mathrm{Cl} = 34.97$$ amu, $$^{37}\mathrm{Cl} = 36.97$$ amu)

Accepted Answer

$$35.45$$ amu

Question 6

Which of the following elements is a metalloid?

Accepted Answer

Silicon

Question 7

Which of the following is the correct name for $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 8

Which of the following is a diatomic molecule in its natural state?

Accepted Answer

Oxygen

Question 9

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

Accepted Answer

$$\mathrm{CH_2O}$$

Question 10

Which of the following best describes the difference between a cation and an anion?

Accepted Answer

A cation is formed when an atom loses electrons, while an anion is formed when an atom gains electrons.

Question 11

Which of the following is the correct name for $$\mathrm{H_2SO_4}$$?

Accepted Answer

Sulfuric acid

Question 12

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 13

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 14

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 15

Which of the following is a property of metals?

Accepted Answer

They are good conductors of heat and electricity.

Question 16

What is the charge on the sulfate ion?

Accepted Answer

$$-2$$

Question 17

Which of the following is the correct name for $$\mathrm{$$KNO_3$$}$$?

Accepted Answer

Potassium nitrate

Question 18

Which of the following is the correct empirical formula for hydrogen peroxide ($$\mathrm{H_2O_2}$$)?

Accepted Answer

$$\mathrm{HO}$$

Question 19

Which of the following is the correct formula for calcium phosphate?

Accepted Answer

$$\mathrm{Ca_3$(PO_4$)_2}$$

Question 20

Which of the following is the correct name for $$\mathrm{CO}$$?

Accepted Answer

Carbon monoxide

Atoms, Molecules, and Ions: Structured Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard