1
anything that has mass and takes up space
matter
solid, liquid, gas
states of matter
the smallest chemical unit of matter
atom
3 subatomic particles that make up an atom
protons, neutrons, electrons
particles arranged in repeating geometric patterns
crystals
positively charged particles
protons
negatively charged particles
electrons
the particles of the nucleus that have no charge
neutrons
model of an atom that shows electrons in circular orbits around the nucleous
Bohr Model
large compound formed from combinations of many monomers
polymers
control center of an atom
nucleus
regions around the nucleus in which given electron or electron pair is likely to be found also known as energy levels
orbitals
Atoms with the same number of protons in their nuclei that have the same properties.
elements
two or more atoms linked together to make a substance with unique properties
molecule
building blocks of polymers
monomers
the number on the periodic table below the letters that tells us the average mass of an atom of that element.
mass Number
the number of protons in the nucleus of an atom
atomic number
shows the types and numbers of atoms combined in a single molecule of a molecular compound
molecular formula
Electrons on the outermost energy level of an atom
valence electrons
what are carbohydrates, DNA, keratin, cellulose, tree sap examples of?
examples of naturally occurring polymers
a substance that contains different compounds and/or elements
mixture
a change in which the atoms or molecules in a substance stay the same
physical change
a change that affects the type of molecules or atoms in a substance
chemical change
composed of two identical atoms
homonuclear diatomic molecules
what are plastic, polyester, nylon examples of
example of a synthetic polymer
A substance that increases the hydrogen ion concentration of a solution.
acid
A substance that decreases the hydrogen ion concentration in a solution.
base
symbol for potential for hydrogen
pH
scale used to measure the strength of an acid or a base
pH scale
man made polymers
synthetic polymers