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20 terms

Basic Chemistry

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atom
the smallest particle that still contains the properties of that element
element
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
neutrons and protons
the two sub atomic particles that make up the nucleus
found orbiting the nucleus, negative
where are electrons found, what kind of charge?
atomic number
tells the number of protons in that atom
= number of protons and electrons
neutral atom has an..
mass number
the sum of the protons and neutrons
proton
a subatomic particle with a positive charge
nuclide
atom of an element that has a fixed number of protons and neutrons
isotope
same element hat has same protons but different neutrons
Ion
when the atom has a positive or negative charge
Anion
negative charge type of ion
Cation
positive charge type of ion
valance electrons
outermost shell that controls bonding in the electron
valance
type of electrons the lewis dot structure shows
periodic table
collection of all the known elements arranged in order by atomic #
metals and nonmetals
what the stair step separates
mass spectrometer
an instrument that separates ionized atoms or molecules based upon their ratio of charge to mass.
Quantum theory
theory that in the universe energy is transferred through very small particles at the atomic and subatomic level
octet rule
rule that you need 8 in the valance shell to be stable