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<p>Highlighted words from chapter 17 science final review</p>

Atom

the smallest particle of an element having the chemical properties of the element

Nucleus

the positively charged dense center of an atom

Proton

positively charged particle

Neutron

neutral particle of an atom

Electron

negatively charged particle

Quark

very small particles of matter that make up protons and neutrons

Electron cloud

a region around the nucleus of an atom where electrons are likely to be found

Atomic number

the number of protons in the nucleus of an atom

Isotope

Atoms of the same element but with different numbers of neutrons

Average atomic mass (amu)

weighted average of the atomic masses for the isotopes of an element

Periodic table

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

Groups

vertical columns of the periodic table

Electron dot diagram

a model of an atom in which each dot represents an outer level electron

Period

a horizontal row of elements in the periodic table

Cl

The symbol for Chlorine is ____

8

The maximum amount of electrons in the second energy level of an atom is _____

Neutrons

Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ from one another by two ____

good

Metals are ____ conductors of heat and electricity

Mass number

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

Iron

The symbol for ____ is Fe

Noble gases

A very stable outer energy level is characteristic for _____

Cloud models

Electron ____ are used to show how electrons in the outer energy level are bonded when elements combine to form compounds

Electron

The location of a _____ cannot be pinpointed exactly

Valence electrons

Dot diagrams are used to represent ____

Quarks

Particles that make up protons and neutrons are ____

name

A chemical symbol represents the ___ of an element

Periods

Horizontal rows on the periodic table are called _____

isotopes

Atoms of the same element with different numbers of neutrons are called ____

Tevatron

A ___ is used to accelerate protons in the study of subatomic particles

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