Chapter 2 Atoms, Molecules, and Ions

Question 1

What did JJ Thomson discover?

Answer 1

Electrons

Question 2

Cathode Ray Tubes

Answer 2

Developed by JJ Thomson

Question 3

Performed the oil drop experiment

Answer 3

Robert Millikan

Question 4

What did Robert Millikan discover?

Answer 4

The charge and mass of one electron

Question 5

What did the Curies (Marie & Peirre) discover?

Answer 5

Radioactivity and radioactive elements, radium and polonium.

Question 6

What did Ernest Rutherford discover?

Answer 6

Came up with the nuclear model of an atom (electrons orbiting the nucleus).

Question 7

Gold Foil experiment

Answer 7

Ernest Rutherford

Question 8

What is an atom?

Answer 8

Tiny, indivisible particles that each element is composed of.

Question 9

What is an anion?

Answer 9

Negatively charged ion

Question 10

What is a cation?

Answer 10

Positively charged ion

Question 11

What is an isotope?

Answer 11

Variations of chemical elements. Same number of protons, different number of neutrons.

Question 12

Where are the main group (representative) elements on the periodic table?

Answer 12

1A-8A

Question 13

What is an ion?

Answer 13

Any atom that has one or more positive or negative electrical charge.

Question 14

What is a molecule?

Answer 14

A particle made up of two or more atoms chemically bonded.

Question 15

What is a formula unit?

Answer 15

Empirical = the lowest whole number ratio representing the number of ions in a ionic compound.

Question 16

What is a compound?

Answer 16

Two or more elements chemically bonded

Question 17

Carbonate

Answer 17

CO₃²⁻

Question 18

Phosphate

Answer 18

PO₄³⁻

Question 19

Hydroxide

Answer 19

OH⁻

Question 20

Sulfate

Answer 20

SO₄²⁻

Question 21

Ammonium

Answer 21

NH₄⁺

Question 22

Acetate

Answer 22

C₂H₃O₂⁻

Question 23

Sulfite

Answer 23

SO₃²⁻

Question 24

Nitrate

Answer 24

NO₃⁻

Question 25

Nitrite

Answer 25

NO₂⁻

Question 26

Cyanide

Answer 26

CN⁻