Ionic
Where are metals on the periodic table?
Middle and left hand side
What is a covalent bond?
when two atoms SHARE electrons so they can both have a full outer shell
What is a polar molecule
they have an uneven sharing of electrons which creates slightly positive and slightly negative ends called poles
Is a cation negative or positive. Why?
Positive, loses electrons
oxygen
What type of elements typically form ionic bonds with each other?
Metal and nonmetal
In a covalent bond, what happens to the electrons?
The electrons are shared between atoms
What is a non-polar molecule?
they have an even charing of electrons so they are neutral
is an anion positive or negative? Why
negative, gains electrons
H
hydrogen
describe an ionic bond
A bond formed by the attraction between oppositely charged ions
What types of elements typically form covalent bonds
Two nonmetals
Give an example of a polar bond
H20
Na+
Cation
N
Nitrogen
when does an atom become positive during bonding? When does it become negative?
Positive; losing electrons. Negative: gaining electrons
What are single, double, and triple covalent bonds
single bonds: 1 pair of electrons shared
Double: 2 pairs of electrons shared
Triple: 3 pairs electrons shared
Give an example of a non-polar bond
CO2
NH4+
cation
K
potassium
describe the melting points of ionic bonds
high melting point
Two properties of covalent bonds
melting point is lower than ionic bonds
They don't dissolve in water
Is CH4 polar or non-polar
non-polar
O2-
anion
C
Carbon