Chapter 4 vocab

Front

Dense, positively charged mass at atom's center

Back

nucleus

Front

Positively charged subatomic particle in an atom's nucleus

Back

proton

Front

Negatively charged subatomic particle found outside the nucleus

Back

electron

Front

Neutral subatomic particle in an atom's nucleus

Back

neutron

Front

Unique number of each element equal to its protons

Back

atomic number

Front

Sum of protons & neutrons in an atom's nucleus

Back

mass number

Front

Atoms of an element with different neutrons and mass numbers

Back

isotopes

Front

Possible energies of electrons in an atom

Back

energy levels

Front

Visual model of electron locations in an atom

Back

electron cloud

Front

Region around nucleus where an electron is likely found

Back

orbital