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Grade 7 CH 4
Atoms, Elements, and the Periodic Table
Question | Answer |
---|---|
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 |