Matter Atoms
Protons
Neutrons
Electrons
Nucleus
Atomic Number
Atomic Mass
- Anything that has mass and takes up space (volume)
- Positively charged particles
Neutral particles; have no electric charge
.
Smallest possible unit into which matter can be divide
while still maintaining its properties
The center of an atom
The number of protons in the nucleus of an atom
: Found Outside the nucleus
Number of protons and Neutrons in the nucleus

Matter - Anything that has mass and takes up space (volume).

Atoms - Smallest possible unit into which matter can be divided, while still maintaining its properties.

Protons - Positively charged particles.

Neutrons - Neutral particles; have no electric charge.

Electrons - Found Outside the nucleus.

Atomic Number - The number of protons in the nucleus of an atom.

Atomic Mass - Number of protons and Neutrons in the nucleus.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.