Unit 1 - Chemistry Flashcards
element is
one type of atom
compound is
2 or more elements combined in a fixed ratio
top 4 elements in humans
CHON
atom is
smallest unit of an element that retains properties of an element
protons are
positive charged subatomic particle
neutrons are
no charged subatomic particle
orbitals surround
nucleus with electrons
electrons are
negative charged subatomic particles
first shell has __ electrons
2
outer shells have __ electrons
8
the atomic number represents
the number of protons
element symbol is the short hand for
the element
mass number =
protons + neutrons
electrons (in neutral element) =
number of protons
like elements that have an equal of proton but diff number on neutron
isotope
a covalent bond is when two elements
share electrons
a non polar covalent bond is when the elements share
electrons equally
a polar covalent bond is when the elements share
electrons unequally
hydrogen bonds are the attractions between
partial positive and partial negative atoms
ionic bonds is the interaction between an atom
that lost an electron and an atom that gained electron
valance
is the bonding capacity of unpaired electrons
chemical reaction is the
making and breaking of chem bonds
