Smallest particle of an element that can exist alone while still retaining the properties of that element
Main parts of the Atom include: (2)
2. Electron Cloud
protons and neutrons
What are the charges of the subatomic particles?
Proton (+)- positive charge
Electron (-)- negative charge
Neutron (o)- no charge
An electron is the smallest subatomic particle.
How many shells make up the electron cloud?
Electron Cloud contains:
protons and electrons
How many electrons can each shell hold?
1st = 2 electrons
2nd = 8 electrons
3rd = 18 electrons
4th-7th = 32 electrons
How do you find the atomic number of an element?
# of protons
The # of protons and the # of electrons is equal to the _____ _____?
The atomic number is used to identify an element.
What is another name for the atomic weight?
The atomic weight is usually a decimal.
Mass number = # of protons + # of neutrons
# of neutrons = ___________ - ____________
Mass number - Atomic number