anything that has mass, and occupies space

a substance that can't be broken down into any other substances by chemical or physical means

a substance made of 2 or more elements chemically combined in a specific ratio or proportion

2 or more substances that are mixed together but not chemically combined

the smallest particle of an element

a small tested idea that connects a wide range of observations

Physical, mental, visual, and other representations of an idea to help people understand a concept that they cannot observe directly

negatively charged particles that move around outside the nucleus of an atom

the central control center of an atom

small positively charged particles that are in the nucleus of an atom

a specific amount of energy an electron has

small uncharged particles that are found in the nucleus of an atom

the electrons in the highest energy level

a representation of the valence electrons of an atom using dots

the force that holds atoms together

a 1 or 2 letter set of characters

the number of protons in the nucleus of the atom

elements in the same horizontal row

elements in the same vertical column of the periodic table; also called a family

elements in the same vertical column of the periodic table; also called a group

an element of group 18 on the PT (PT=Periodic table)

an element belonging to group 17 of the periodic table

an element belonging to group 1 of the periodic table

an atom, or group of atoms that has become electrically charged

an ion that is made of 1 or more atoms

the attraction between oppositely charged ions

a compound that consists of positive, and negative ions

a combination of symbols that represent different elements in a compound

a number in a chemical formula

an orderly 3 dimensional patterns of ions or atoms in a solid

a chemical bond that forms when 2 atoms share electrons

a neutral particle made of 2 or more atoms joined by covalent bonds

a chemical bond formed when atoms share 2 pairs of electrons

a chemical bond formed when atoms share 3 pairs of electrons

a compound that is composed to of molecules

a covalent bond in which electrons share unequal electrons

a covalent bond in which electrons are shared equally

an attraction between a positive metal ion, and the electrons surround it

a material made of 2 or more elements that has the properties of a metal

a term used to describe a material that can be pulled out into a long wire

a term used to describe a material that can be hammered into a shape