click below
click below
Normal Size Small Size show me how
SHMS7 Ch 3 sec 2
vocabulary
Question | Answer |
---|---|
Element | A pure substance that cannot be broken down into other substances by chemical or physical means. |
Atomic Mass | The average mass of all the isotopes of an element. |
Atomic Number | The number of protons in the nucleus of an atom. |
Periodic Table | A chart of the elements showing the repeating pattern of their properties |
Chemical Symbol | A one- or two-letter representation of an element. |
Period | A horizontal row of elements in the periodic table. |
Group | Elements in the same vertical column of the periodic table; also called family |
Chemical Formula | A formula that gives the elements in a compound and the ratio of atoms. |
Compound | A pure substance made of two or more elements chemically combined. |
Molecule | A particle made of two or more atoms bonded together. |