Atoms Ch. 3

Question 1

What is the atomic number?

Answer 1

The number of protons in a atom

Question 2

What is the mass number

Answer 2

The number of protons and neutrons

Question 3

What is a nuclide?

Answer 3

General term for a specific isotope of an element

Question 4

What is the average atomic mass

Answer 4

Weighted average of the atomic masses of naturally occurring isotopes

Question 5

Isotope definition

Answer 5

Atoms of the same element that have different masses

Question 6

The bond that transfers electrons

Answer 6

Ionic Bonds

Question 7

The bond that shares electrons

Answer 7

Covalent bonds

Question 8

Mole

Answer 8

The amount of a substance that contains as many particles as 12 g of carbon-12 (6.022 x 10^23)

Question 9

Avogadro’s number

Answer 9

6.022 x 10^23

Question 10

Law of conservation of mass

Answer 10

Mass is neither created or destroyed during ordinary chemical reactions or physical changes

Question 11

Law of definite proportions

Answer 11

A chemical compound contains the same elements in exactly the same proportions by mass regardless of size or source

Question 12

Law of multiple proportion

Answer 12

2 or more different compounds are composed of the same 2 elements the. The ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers