Atom
Smallest particle of an element
atomic number
the number of protons in the nucleus of an atom
atomic mass
Number of protons and neutrons
Proton
positively charged particle
Neutron
A small particle in the nucleus of the atom, with no electrical charge
Electron
negatively charged particle
Enzyme
A type of protein that speeds up a chemical reaction in a living thing
Substrate
Reactant molecule which binds to enzyme
active site
The part of an enzyme or antibody where the chemical reaction occurs.
Amu unit
Amu stands for atomic mass unit and is used to indicate mass on an atomic or molecular scale
akaline earth metals
elements belonging to group two on the periodic table. They are less reactive and harder than alkali metals.
Akali Metals
Group 1A, excluding Hydrogen. Highly reactive.
reaction
process of molecular change
Reactivity
The ease and speed with which an element combines, or reacts, with other elements and compounds.
Reactants
elements or compounds that enter into a chemical reaction
Heterotroph
An organism that cannot make its own food.
Autotroph
An organism that makes its own food
Photosynthesis
Plants use the sun's energy to convert water and carbon dioxide into sugars