1.
The basic unit of a chemical element
2.
Positively charged particle in the nucleus
3.
Subatomic particle with no electrical charge
4.
Negatively charged particle found in orbitals
5.
Atoms of the same element with different neutron counts
6.
Electrons in the outermost shell of an atom
7.
An atom that has gained or lost electrons
8.
A positively charged ion
9.
A negatively charged ion
10.
The dense, central core of an atom
11.
Region in space where an electron is likely to be found
12.
Highly reactive elements in Group 17
13.
Stable elements in Group 18 with full outer shells
14.
Bond formed by the sharing of electron pairs
15.
Bond formed by the transfer of electrons
16.
Group of atoms bonded together
17.
Distribution of electrical charge over joined atoms
18.
Regular three-dimensional arrangement of atoms
19.
Ability of an atom to attract shared electrons
20.
Substance composed of two or more different elements
21.
An ion composed of two or more atoms
22.
State of matter with fixed shape and volume
23.
Fluid state with definite volume but no fixed shape
24.
State of matter that expands to fill its container
25.
Ionized state of matter found in stars
26.
The substance that is dissolved in a solution
27.
The substance that does the dissolving
28.
Concentration measured in moles per liter
29.
Solution containing the maximum amount of solute
30.
Movement of particles from high to low concentration
31.
Substance that speeds up a reaction without being consumed
33.
Substance present at the start of a reaction
34.
Substance formed as a result of a chemical reaction
35.
Reaction that releases energy as heat
36.
Reaction that absorbs energy from surroundings
37.
The loss of electrons during a reaction
38.
The gain of electrons during a reaction
39.
Solid that forms and settles out of a liquid mixture
