Questions and Correct
Answers | New Update
isotopes - ANSWER ✔✔atoms of the same element that have
different numbers of neutrons
trace elements - ANSWER ✔✔vital for normal biological functions
orbitals - ANSWER ✔✔regions around the nucleus in which given
electron or electron pair is likely to be found
valence electrons - ANSWER ✔✔electrons in an atom's outermost
energy level
,chemical bonds - ANSWER ✔✔chemical linkages in which atoms
tend to combine into molecules
ionic bond - ANSWER ✔✔the attraction between oppositely charged
ions
covalent bonds - ANSWER ✔✔equal or unequal sharing of valence
electrons
hydrogen bonds - ANSWER ✔✔non-chemical bond between the
hydrogen atom and more electronegative elements like N, O, and F
vander del waals forces - ANSWER ✔✔weak, short-range forces
between non polar molecules
polar - ANSWER ✔✔unequal sharing of electrons
non-polar - ANSWER ✔✔equal sharing of electrons
electronegativity - ANSWER ✔✔describes the tendency of an atom or
a functional group to attract electrons toward itself
molecular geometry - ANSWER ✔✔the 3D arrangement of molecules
concentration - ANSWER ✔✔the number of molecules or ions of a
substance in a unit volume
, molarity - ANSWER ✔✔the number of moles of a substance
dissolved in 1L of a solution
S orbitals - ANSWER ✔✔spherical shape, holds up to 2 electrons per
energy level
P orbitals - ANSWER ✔✔dumbbell shape, holds up to 6 electrons per
energy level
D orbitals - ANSWER ✔✔clover shape, holds up to 10 electrons per
energy level
hund's rule - ANSWER ✔✔every orbital in a subshell only occupies
an empty "space" before pairing up
pauli-exclusion principle - ANSWER ✔✔no more than 2 electrons per
orbital, the two electrons need opposite spin
aufbau principle - ANSWER ✔✔electrons fill lower energy atomic
orbitals before filling higher energy ones
acids - ANSWER ✔✔proton donors which release H+ in water lower
the pH
bases - ANSWER ✔✔proton acceptors which accept H+ in water
increase the pH
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