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Matter Test Review

7th Grade Matter Test Review 2022

TermDefinition
Proton What is the positive subatomic part of an atom?
Nucleus The part of the atom that gives it its mass
Metalloids Elements that have properties of metals and non-metals
Electron The subatomic particle flying around the nucleus of an atom
Metals Elements to the left of the zigzag line on the periodic table
Period A row of elements on the periodic table
Molecule 2 or more atoms chemically bonded
Compound 2 or more different elements chemically bonded
Valence The # of electrons on the outer energy level of an atom
Carbon This element is called the basis of life
Neutral What type of charge does a neutron have?
Malleable Metals can be hammered in to thin sheets because they are __________
Ductile Metals can be drawn in to thin wires because they are __________
Family Elements found in a column on the periodic table
Periodic Something with a regular repeating pattern is also called __________
Luster Metals can be shiny because they have __________
Evaporation A process that changes a liquid into a gas
Solid Phase of matter with a fixed volume & shape
Positive A nucleus has this type of charge
Isotope Atoms of the same element with different #’s of neutrons
Mixture 2 or more substances mixed but not chemically bonded
Hydrogen There are 2 atoms of ______in a molecule of water
Noblegases Inert elements in family 18 are called _________
Condensation A process that changes a gas into a liquid
Alkalimetals The family with the most highly active solids
Radioactive unstable atoms that decay or change
Silicon Family 14 metalloid in period 3 on the P.Table
Halflife The amount of time it takes half of a radioactive sample to decay
Reactivity Chemical property of elements
Element simplest pure substance in which all atoms are of one type
Created by: coach_fletcher
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