Test on 12/7/17 Flashcards
compound which contains hydrogen and carbon atoms bonded and is associated with a living thing
organic
compounds which don’t contain carbon and come from non-living matter
inorganic
a subatomic particle with negative electrical charge found in an energy level
electron
a subatomic particle with no charge found in the nucleus of an atom
neutron
a subatomic particle with positive electrical charge found in the nucleus of an atom
proton
a substance consisting of one type of atom that can’t be separated into simpler substances
element
a substance formed when 2 or more elements chemically combine or bond
compound
an abbreviation or short representation of a chemical element; the symbols on the periodic table
chemical symbol
an electron of an atom, located in the outermost shell of the atom that can be transferred or shared with another atom
valence electron
horizontal row of elements in the periodic table whose properties change gradually and predictably and share the same number of electron shells
period
positively charged center of an atom with nearly all of the atomic mass and consists of protons and neutrons
nucleus
region surrounding the nucleus of an atom, where electrons are most likely to be found
energy level
the molecules found on the left side of a chemical equation
reactants
the number of protons in the nucleus of an atom
atomic number
the number of protons plus neutrons in an atom
atomic mass
the smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms
molecule
the smallest particle of an element that can exist either alone or in a combination
atom
vertical column of elements on the periodic table that have similar physical or chemical properties and same number of valence electrons
group
how are groups different than periods?
groups: valence electrons
periods: energy levels
how are elements arranged on the periodic table?
in order of increasing atomic #
what is the same for all atoms of the same element?
they have the same number of protons
what determines an atom’s group?
how many valence electrons it has
what determines the period an atom is found in
number of energy levels
location of protons, neutrons, and electrons and what charge do they have
protons: positive and nucleus
neutrons: no charge and nucleus
electrons: negative and energy levels
remember APE MAN
atomic number = protons = electrons
mass - atomic number = neutrons
how many electrons can each energy level hold?
1st: 2
2nd: 8
3rd: 18
