Chapter 3

Question 1

Atom

Answer 1

Smallest particle that can be considered an element

Question 2

Electron

Answer 2

Negatively charged particles

Question 3

Nucleus

Answer 3

Positive charge must be packed within a small region in its center called the nucleus

Question 4

Protons

Answer 4

Positively charged particles

Question 5

Energy level

Answer 5

An electrons movement

Question 6

Neutron

Answer 6

There is no electric charge

Question 7

Atomic number

Answer 7

The number of protons in the nucleus of an atom is the atomic number

Question 8

Isotopes

Answer 8

Numbers of neutrons

Question 9

Mass number

Answer 9

The sum of protons and neutrons in an atom

Question 10

Atomic number

Answer 10

The number of protons in the nucleus

Question 11

Periodic table

Answer 11

An arrangement of elements showing the repeating pattern of their properties

Question 12

Chemical symbol

Answer 12

Just below the atomic number is the letter k-the chemical symbol

Question 13

Periods

Answer 13

The periodic table is arranged in rows called periods

Question 14

Groups

Answer 14

The elements column in the periodic table

Question 15

Metals

Answer 15

Elements that are good conductors of electric current and heat.

Question 16

Luster

Answer 16

Shiny and reflective

Question 17

Malleable

Answer 17

Can be hammered or rolled into flat sheets

Question 18

Ductile

Answer 18

Material that can be pulled out or drawn into long wires

Question 19

Thermal conductivity

Answer 19

The ability of an object to transfer heat

Question 20

Electrical conductivity

Answer 20

The ability of an object to carry an electric current

Question 21

Reactivity

Answer 21

How an element combines or reacts with other substances

Question 22

Corrosion

Answer 22

The deterioration of a metal due to a chemical reaction

Question 23

Alike metal

Answer 23

Most reactive elements in the periodic table

Question 24

Alkaline earth metals

Answer 24

Harder and denser and melt at higher temperatures

Question 25

Transition metals

Answer 25

Hard and shiny solids

Question 26

Radioactive decay

Answer 26

The atomic nuclei of radioactive isotopes realesed fast moving particles and energy

Question 27

Nuclear reactions

Answer 27

Involve the particles in the nucleus of an atom

Question 28

Radioactivity

Answer 28

High consitration of a chemical

Question 29

Metallic bond

Answer 29

An attraction between a positive metal ion and the electrons surrounding it

Question 30

Alloy

Answer 30

A mixture made of 2 or more elements at least one of which is a metal