Honors Biology Ch. 6.1 and 6.2 Vocabulary Quiz

building block of matter : contains sub atomic particles - neutrons, protons, and electrons

• atom

• ion

• isotope

• compound

Center of an atom; contains neutrons and protons

• electron

• nucleus

• reactant

• element

positively charged particle in an atom's nucleus

• electron

• neutron

• proton

particle without a charge in an atom's nucleus

• electron

• neutron

• proton

negatively charged particle that occupies space around an atom's nucleus

• electron

• neutron

• proton

pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means

• element

• isotope

• ionic bond

• catalyst

tow or more atoms of the same element having different numbers of neutrons

• molecule

• catalyst

• isotope

• proton

pure substance with unique properties; formed when two or more different elements combine

• mixture

• ionic bond

• nucleus

• compound

type of chemical bond formed when atoms share electrons

• ionic bond

• covalent bond

• product

• activation energy

compound whose atoms are held together by covalent bonds

• molecule

• catalyst

• substrate

• electron