PPT 2 Anatomy and Physiology

Subatomic particles

components of atoms smaller than the atom itself

electron

one negative unit - almost no mass

proton

one positive unit - one mass unit

neutron

no charge - one mass unit

atoms

smallest identifiable part of an element with properties

ions

an atom or molecule with a net electrical charge, formed when it gains or loses electrons

isotopes

atoms of the same element that have the same number of protons but different numbers of neutrons

compound

a substance made of more than one element

molecule

smallest identifiable part of a compound

ionic bond

a chemical bond formed when one atom gives an electron to another atom

covalent bond

a chemical bond formed when two atoms share electrons

cation

positively charged ion

anion

negatively charged ion

anatomic weight

number of protons + number of neutrons

atomic number

number of protons