What are the 2 subatomic particles found in the nucleus called?
protons and neutrons
Two or more atoms joined together is called a ___________.
Molecule
Atoms are mostly made up of __________________.
Empty Space
Matter that is made up of only 1 kind of atom is called a/an:__________.
Element
What subatomic particle orbits the nucleus?
Electron
What charge do electrons have?
Negative
Gold has an atomic number of 79. What does that mean?
It has 79 protons.
How many naturally occurring elements are found on the Periodic Table?
92
What makes one element different from another?
The number of protons
What is the smallest particle of matter called?
atom
How many elements are found on the Periodic Table?
118
A chart that scientists use to organize the elements is called:________
The Periodic Table
TRUE or FALSE. NaCl is considered a compound.
TRUE
__________ is the amount of matter in an object.
Mass
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
Neutrons have a _______charge.
neutral
What element has 6 protons in its nucleus?
carbon
What charge does a proton have?
Positive
Matter that is made of two or more elements is called a/an__________.
COMPOUND
What is the dense area in the center of an atom called?
nucleus
Scientists have an idea that everything is made of small particles. What is this idea called?
Atomic Theory
CO2 is a molecule of what two elements?
Carbon and Oxygen
What are the 2 properties that all matter has?
Mass and Volume