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Grade 7 CH 4

Atoms, Elements, and the Periodic Table

QuestionAnswer
A small particle that makes up most types of matter. ATOM
The weighted average mass of the isotopes of an element. ATOMIC MASS
The number of protons in an atom. ATOMIC NUMBER
A substance made up of two or more elements chemically bonded. COMPOUND
Small negatively charged particles in atoms. ELECTRONS
Matter made of only one kind of atom. ELEMENT
Matter is not created or destroyed, it can only change form. ISOTOPES
Matter is not created or destroyed, it can only change form. LAW OF CONSERVATION OF MATTER
Anything that has mass and takes up space. MATTER
Elements that have characteristics of both metals & nonmetals. METALLOIDS
Elements that have a shiny or metallic luster and are good conductors of heat and electricity. METALS
Two or more substances are combined but do not combine to make a new substance. MIXTURE
Neutral charged particles in the center of the atom. NEUTRONS
Elements that are dull in appearance and poor conductors of heat and electricity. NONMETALS
The positively charged central part of an atom, which has 99% of its mass. NUCLEUS
Small positively charged particles in atoms. PROTON
Matter that has the same composition and properties throughout. SUBSTANCE
Created by: Bridgerdon
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