Anything that has mass and takes up space.
A small particle that makes up most types of matter.
Law of conservation of matter
Matter is not created or destroyed - it only changes.
Invisible, negatively charged particles.
Is positively charged and the central part of an atom.
Positively charged particles in the nucleus.
Matter made up of one type of atom.
It tells you the number of protons in the nucleus of each atom of an element.
Atoms of the same element that have different numbers of neutrons.
The number of protons plus the number of neutrons an atom has.
The weighted average mass of the isotopes of an element.
They generally have a shiny or metallic luster and are good conductors of heat and electricity.
Elements that are usually dull in appearance.
Elements that have characteristics of metals and nonmetals.
Matter that has the same composition and properties.
A substance whose smallest unit is made up of atoms of more than one element bonded together.
When two or more substances come together but don't combine to make a new substance.