structure of an atom - ANSWER-consist of protons and neutrons
in nucleus
electrons in a cloud around nucleus
protons - ANSWER-Positively charged particles
neutrons - ANSWER-the particles of the nucleus that have no
charge
electrons - ANSWER-Negatively charged particles
volume - ANSWER-a measure of space
density - ANSWER-a measure of how much mass is packed into
a certain amount of space
,non significant figures - ANSWER-leading zeros
significant figures - ANSWER-non zeros, zeros between two
non zeros, and zeros at end of number, and it is to the right of
the decimal place
atomic number - ANSWER-the number of protons in the
nucleus of an atom
atomic mass - ANSWER-The average mass of all the isotopes of
an element
how to convert moles to number of particles - ANSWER-1 mole
= 6.022 x 10^23 particles
an element is defied by - ANSWER-the number of protons it
contains
isotopes - ANSWER-same number of protons, different number
of neutrons
**mass # = A = (# of p+) + (# of n)
, ions - ANSWER-different number of electrons
- in a neutral atom, the # of p+ = # of e
- in an ion, we can have more e or fewer e
cations - ANSWER-positively charged ions
anions - ANSWER-negatively charged ions
ionic compounds - ANSWER-compounds that contain ionic
bonds (contains positive and negative ions)
molar mass - ANSWER-is the mass (in g) of ONE mole (g/mol)
ionic bonds - ANSWER-an electron leaves 1 atom and attaches
to another aton
- metal and non metals, different sides of periodic table.
covalent bonds - ANSWER-an electron is shared between 2
atoms (no ions)
- 2 nonmetals, same side of per. table
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