Chapter 4 Atoms & the Periodic Table

Question 0

Electron

Answer 0

The negatively charged particles that orbit the nucleus of an atom

Question 1

Atom

Answer 1

The smallest particle of an element

Question 2

Nucleus

Answer 2

Tiny region in an atom’s center

Question 3

Proton

Answer 3

The positively charged particles found in an atom’s nucleus

Question 4

Neutron

Answer 4

The neutral particle found in an atom’s nucleus

Question 5

Atomic Number

Answer 5

The number of protons in an atom

Used to arrange particles on the periodic table

Question 6

Isotope

Answer 6

Atoms with the same number of protons and a different number of neutrons than the original atom

Ex: atom = carbon, isotope = carbon-14

Question 7

Atomic Mass

Answer 7

The average mass of all the isotopes of an element

Whole number = protons + neutrons

Question 8

Periodic Table

Answer 8

A chart of the elements showing a repeating pattern of their properties

Question 9

Periods

Answer 9

The horizontal rows on the periodic table

Question 10

Groups

Answer 10

The vertical columns on the periodic table

Question 11

Chemical Symbol

Answer 11

The one or two letter representation of an element

Question 12

Metal

Answer 12

A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity

Question 13

Ductile

Answer 13

A material that can be pulled out, or drawn, into wire

Question 14

Malleable

Answer 14

A material that can be hammered into thin sheets or other shapes

Question 15

Conductivity

Answer 15

The ability of an object to transfer heat or electricity to another object

Question 16

Reactivity

Answer 16

The ease and speed with which an element combines, or reacts, with other elements or compounds

Question 17

Corrosion

Answer 17

The destruction of a metal through gradually wearing away in chemical reactions

Question 18

Alkali Metals

Answer 18

The metals in Group 1

Question 19

Alkaline Earth Metals

Answer 19

The metals in Group 2

Question 20

Transition Metals

Answer 20

The metals in Groups 3 through 12

Question 21

Nonmetal

Answer 21

An element that lacks the properties of a metal

Most are poor conductors of electricity and heat and are reactive with other elements

Question 22

Halogens

Answer 22

The elements in Group 17

Question 23

Noble Gases

Answer 23

The elements in Group 18

Question 24

Metalloids

Answer 24

Have characteristics of both metals and nonmetals

Question 25

Semiconductor

Answer 25

Substance that can conduct electricity under some conditions but not others