1.
Anything that has mass and takes up space
2.
A pure substance that cannot be broken down into simpler substances.
3.
A one- or two-letter abbreviation used to represent an element.
4.
The smallest particle of an element that still has the element’s chemical properties.
5.
The theory that all matter is made of tiny particles called atoms.
6.
The center of an atom that contains most of the atom’s mass.
7.
A positively charged particle found in the nucleus of an atom.
8.
A particle with no charge found in the nucleus of an atom.
9.
A negatively charged particle that moves around the nucleus of an atom.
10.
The number of protons in an atom.
11.
The total number of protons and neutrons in an atom.
12.
A chart that organizes elements by increasing atomic number.
13.
Vertical columns on the periodic table that contain elements with similar properties.
14.
Horizontal rows on the periodic table.
15.
Describes a pattern that repeats.
16.
Elements that conduct heat and electricity, are shiny when polished, and can be shaped.
17.
Elements that look dull and break instead of bend.
18.
Elements that have properties of both metals and nonmetals.
19.
A substance formed when two or more elements chemically join together.
20.
Formula Chemical Formula: bols and numbers that shows the types and numbers of atoms in a compound.
21.
The smallest particle of a compound.
