The Atomic Number is the number of ___________ in the nucleus of an atom.
Protons
Matter that is made of two or more elements is called a/an__________.
COMPOUND
Neutrons have a _______charge.
neutral
TRUE or FALSE. NaCl is considered a compound.
TRUE
What are the 2 properties that all matter has?
Mass and Volume
Anything that is not matter, is considered a form of ___________instead.
Energy
CO2 is a molecule of what two elements?
Carbon and Oxygen
__________ is the amount of matter in an object.
Mass
What charge does a proton have?
Positive
Scientists have an idea that everything is made of small particles. What is this idea called?
Atomic Theory
What are the 2 subatomic particles found in the nucleus called?
protons and neutrons
A chart that scientists use to organize the elements is called:________
The Periodic Table
What makes one element different from another?
The number of protons
How many naturally occurring elements are found on the Periodic Table?
92
What charge do electrons have?
Negative
Gold has an atomic number of 79. What does that mean?
It has 79 protons.
Atoms are mostly made up of __________________.
Empty Space
Two or more atoms joined together is called a ___________.
Molecule
What is the smallest particle of matter called?
atom
What element has 6 protons in its nucleus?
carbon
How many elements are found on the Periodic Table?
118
What is the dense area in the center of an atom called?
nucleus
Matter that is made up of only 1 kind of atom is called a/an:__________.
Element
What subatomic particle orbits the nucleus?
Electron