Sths Is9 Atomic Structure

Front 1

Atom

Back 1

The smallest unit of matter, the “Lego’s” of the universe, most have an overall charge of neutral (o)

Front 2

Proton

Back 2

The positive (+) part of the atom, found inside the nucleus of an atom

Front 3

Neutron

Back 3

Neutral (o) part of the atom, found inside the nucleus of an atom

Front 4

Electron

Back 4

Negative (-) part of the atom, found outside the nucleus of an atom

Front 5

Nucleus

Back 5

Protons and neutrons tightly packed together in the center of an atom, its overall charge is positive (+)

Front 6

Energy Levels

Back 6

The layers or shells around the atom where electrons are found

Front 7

Element

Back 7

Any sample of matter made up of only one type of atom

Front 8

Atomic Number

Back 8

The whole number on the periodic table, it tells you the number of protons and electrons in that atom

Front 9

Periods

Back 9

The rows on the periodic table, there are 7, this tells you how many energy levels atoms have in that period

Front 10

Groups

Back 10

Columns on the periodic table, there are 18, this tells you the number of valence electrons, all elements in the same group have similar properties

Front 11

Isotope

Back 11

An atom of the same element with a different number of neutrons, they have a different mass than the majority

Front 12

Metals

Back 12

Found on the left side of the dark stair case line, good conductors of heat and electricity, malleable

Front 13

Metalloids

Back 13

Found along the dark stair case line, properties of both metals and nonmetals

Front 14

Nonmetals

Back 14

Found on the right side of the dark stair case line, poor conductors of heat and electricity, not malleable

Front 15

Ionic Compounds

Back 15

A compound formed from electrons being taken or given, usually formed from a metal and a nonmetal

Front 16

Covalent Compounds

Back 16

A compound formed from atoms sharing electrons, usually formed from all nonmetal atoms

Front 17

Atomic Mass

Back 17

Atomic mass – atomic number = the number of neutrons an atom has

Front 18

Valence Electrons

Back 18

Electrons in the outermost shell of an atom. The group number tells you how many valence electrons an atom has, groups 13-18, drop the 1

Front 19

Octet Rule

Back 19

Elements need 8 valance electrons to be stable, or have a full outer shell

Front 20

Compounds

Back 20

Two or more elements chemically combined, the elements lose their individual properties, the new compound formed has new properties, the ratio of the parts of a compound are exact