Basic facts
What basic unit of matter makes up everything in the universe?
Atoms
How many subatomic particles make up an atom and what are there names?
3 - protons, neutrons, and electrons
Which 2 subatomic particles have a "large" mass?
protons & neutrons
What is the atomic number of silicon?
Hint: Use your periodic table!
14
The atomic number represents what 2 subatomic particles?
protons & electrons
What are the FOUR parts to an atom?
proton, neutron, electron, & nucleus
Which 2 subatomic particles live in the nucleus?
proton & neutron
Which subatomic particle has a "small" mass?
electrons
What is the atomic mass of calcium?
Hint: Use your periodic table!
40
The atomic mass represents what 2 subatomic particles?
protons + neutrons
The mass of an atom mostly comes from which part?
the nucleus
Where do electrons "live"?
electron energy level
positive
Magnesium's top number is 12. What does this represent?
atomic number - protons & neutrons
How can you find out how many neutrons an atom has?
atomic mass - atomic number
How many elements are on the periodic table?
118
What is the name of the center of the atom?
nucleus
What is the charge of an electron?
negative
p - 10
e - 10
n - 10
How do you find out how many protons or electrons an atom has?
look at the atomic number
How many groups does OUR periodic table have?
8
What is the charge of a nucleus? Why does it keep this charge?
positive bc protons are positive. Neutrons are neutral and have no charge.
What is the charge of a neutron?
neutral
How many protons, neutrons, and electrons does Boron have?
p - 5
e - 5
n - 6
How many periods does OUR periodic table have?
4