Science Semester 2 Final part 1

17 terms by natqueencole14

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Validity

extent to which a test measures what it claims to measure

Atom

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

Atomic Symbol

an abbreviation for an element derived from the first one or two letters of the elements name

Nucleus

the core of an atom, consisting of two basic subatomic particles-protons and neutrons

Atomic Number

the number that designates the identity of an element, which is the number of protons in the nucleus

Mass Number

the number associated with an atom that is the same as the number of protons plus neutrons in its nucleus

Proton

electric charge=positive charge
Location in an atom=atomic nucleus

Neutron

electric charge=electrically neutral
location in an atom=atomic nucleus

Electron

electric charge=negative charge
location in an atom=negative charged particles

Element

a fundamental material consisting of only one type of atom

Compound

a material in which atoms of different elements are chemically held to one another

Metal

element that is generally shiny, opaque, malleable, ductile and a good conductior of electricity and heat

Metalloid

(18 on Period Table) exhibits both metallic and non metallic properties

Nonmetals

an element that is nonmalleable, non ductile, and a poor conductor of electricity and heat

Periodic Table

highly organized chart listing all the known elements

group

a vertical column in the periodic table

period

a horizontal column in the periodic table

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