Matter
Anything that has mass and takes up space.
Matter
is is the smallest chemical unit of matter
Atom
what is the difference between atoms and ions
atom has no charge and ions have a charge
atoms that have the same number of protons in their nuclei, have similar properties
elements
the 1-2 letter abreviation
Chemical Symbol
is not the same as weight
Mass
the three parts of a atom
electrons, protons and neutrons
having a charge that is neither negitive or positive
neutral
two or more atoms linked together to make a substance with unique properties
Molecules
Periodic table's top number that represents the number of protons and neutrons in a given element.
Atomic Number
What is the scientific formula for a mole
6.02 x 1023 particles per mole
protons and neutrons together in the center of a atom
Nucleus
valance electrons
what is the atomic formula for Calcium Chloride?
CaCl2
bottom number repersenting the average Mass of a element.
Atomic Mass
the pressure and temperature of a material will determin if the material is in one of three states
solid, liquid or gas
electron
type of bond between elements when different electronegativities share electrons (get pulled in a certain direction)
Polar Covalent Bond
Write the molecular formula for water
H20
The atomic number of Carbon
6
changes depending on the gravitational pull
Weight
created the atomic model in 1913
Neils Bohr
breaks apart a atom
nuclear power
how many families/ groups of elements are found on the periodic table?
what is 18
the chemical symbol of Helium
He