Chapters 7 - 8 Science

Front 1

Atom

Back 1

is the smallest piece of an element that still represents that element

Front 2

Electron

Back 2

is a particle with one negative charge

Front 3

Nucleus

Back 3

most of an atoms mass and positive charge is concentrated in a small area in the center of an atom is the ______

Front 4

Proton

Back 4

is an atomic particle with a positive charge

Front 5

Neutron

Back 5

is a neutral particle that exist in the nucleus of an atom

Front 6

Electron Cloud

Back 6

is an area around an atomic nucleus where an electron is most likely to be located

Front 7

Quark

Back 7

any of a number of subatomic particles carrying a fractional electric charge

Front 8

Atomic Number

Back 8

the number of protons in the an atom of an element

Front 9

Isotope

Back 9

atoms of the same element that have different numbers of neutrons

Front 10

Mass Number

Back 10

is the sum of the number of protons and neutrons in an atom

Front 11

Average atomic mass

Back 11

is the average mass of an elements isotopes, weighted according to the abundance of each isotope

Front 12

Radioactive

Back 12

elements that spontaneously emit radiation

Front 13

Nuclear Decay

Back 13

is the process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation

Front 14

Ion

Back 14

is an atom that is no longer neutral because it has gained or lost electrons

Front 15

Chemical Bond

Back 15

is a force that holds two or more atoms together

Front 16

Valence electron

Back 16

is an outermost electron of an atom that participates in chemical bonding

Front 17

Electron dot diagram

Back 17

is a chemical bond formed two atoms share one or more pairs of valence electrons

Front 18

Orbital diagram

Back 18

are pictorial descriptions of the electrons in an atom.

Front 19

Electron Configuration

Back 19

is the distribution of electrons of an atom or molecule

Front 20

Covalent bond

Back 20

is a chemical bond formed when two atoms share one or more pairs of valance electrons

Front 21

Molecule

Back 21

is a group of atoms held together by covalent bonding that acts as an independent unit

Front 22

Polar molecule

Back 22

a molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons

Front 23

Chemical Formula

Back 23

is a group of chemical symbols and numbers that represent the elements and the number of atoms of each elements that make up a compound

Front 24

Ionic bond

Back 24

the attraction between positively and negatively charged ions in an ionic compound

Front 25

Metallic bond

Back 25

is a bond formed when many metal atoms share their poled valance electrons