Ch 4

Question 1

Theory that states in part that most of the volume of the atom is empty space

Answer 1

Nuclear theory of the atom

Question 2

One 12th of the mass of a Carbon atom containing six protons and six neutrons

Answer 2

Atomic mass unit (amu)

Question 3

Number of protons in the nucleus of an atom

Answer 3

Atomic number (Z)

Question 4

One or two letter abbreviations for an element

Answer 4

Chemical symbol

Question 5

When the elements are arranged in order of increasing atomic number, certain set of properties recur periodically

Answer 5

Periodic law

Question 6

Elements whose properties tend to be more predictable based on their position in the periodic table

Answer 6

Main group elements

Question 7

Elements whose properties tend to be less predictable based simply on their position in the periodic table

Answer 7

Transition metals

Question 8

Column of elements in the periodic table

Answer 8

Family or group (of elements)

Question 9

Group 8A elements

Answer 9

Noble gases

Question 10

Group 1A elements

Answer 10

Alkali metals

Question 11

Group 2A elements

Answer 11

Alkaline earth metals

Question 12

Relative amount of an isotope in a naturally occurring sample of a given element

Answer 12

Percent natural abundance

Question 13

Some of the number of protons and neutrons in an atom

Answer 13

Mass number (A)

Question 14

Subatomic particles emitted from unstable nuclei

Answer 14

Nuclear radiation

Question 15

Average mass of the atoms that compose an element

Answer 15

Atomic mass

Question 16

Characteristic of unstable nuclei that emit radiation

Answer 16

Radioactive

Question 17

Organized chart of the elements

Answer 17

Periodic table