What kind of bond is created by the attraction between atomic particles of opposite charge?
nuclear bond
covalent bond
ionic bond
hydrogen bond
ionic bond
What kinds of substances dissolve in water?
hydrophobic
nonpolar
oily
hydrophilic
hydrophilic
Which is a product in the following chemical reaction? CH 4 + 2O 2 → CO 2 + 2H 2 O
H 4
H 2 O
CH 4
O 2
H 2 O
What force holds atoms together in a compound?
gravitation
nuclear force
chemical bond
electromagnetism
chemical bond
Nitrogen-14 and nitrogen-15 are isotopes of the same element. How do these two isotopes differ?
They have different numbers of nuclei.
They have different numbers of protons.
They have different numbers of neutrons.
They have different numbers of electrons.
They have different numbers of neutrons.
Chemical processes store and release _____ in the bonds of molecules.
atoms
energy
mass
matter