What is the dense area in the center of an atom called?
nucleus
What is the smallest particle of matter called?
atom
What subatomic particle orbits the nucleus?
Electron
Matter that is made up of only 1 kind of atom is called a/an:__________.
Element
A chart that scientists use to organize the elements is called:________
The Periodic Table
Two or more atoms joined together is called a ___________.
Molecule
Matter that is made of two or more elements is called a/an__________.
COMPOUND
What are the 2 properties that all matter has?
Mass and Volume
Scientists have an idea that everything is made of small particles. What is this idea called?
Atomic Theory
What makes one element different from another?
The number of protons
What are the 2 subatomic particles found in the nucleus called?
protons and neutrons
How many naturally occurring elements are found on the Periodic Table?
92
What charge do electrons have?
Negative
Anything that is not matter, is considered a form of ___________instead.
Energy
The Atomic Number is the number of ___________ in the nucleus of an atom.
Protons
Atoms are mostly made up of __________________.
Empty Space
