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
energy
What is a buffer?
a solution that neutralizes bases and drops the pH of acids
a solution that neutralizes acids and increases the pH of bases
a solution that can receive any amount of acid or base to form a neutral solution
a solution that can receive moderate amounts of acid or base with little change in pH
a solution that can receive moderate amounts of acid or base with little change in pH
What causes a chemical bond to form between atoms?
ejecting or absorbing electrons
destroying or creating electrons
transferring or sharing electrons
spinning or stopping electrons
transferring or sharing electrons
What general shape do water molecules have?
circular
long chain
bent angle
straight
bent angle
What form of matter is made from only one type of atom?
element
material
compound
molecule
element
What is always true of a binary compound?
It has two atoms.
It has covalent bonds.
It has two elements.
It has a double bond.
It has two elements.
What name is given to elements with the same number of protons but differing numbers of neutrons?
acids
bases
ions
isotopes
isotopes
What is chemistry?
the study of matter and how it changes
the study of what living things are made of
the study of living things and how they change
the study of matter and how it moves
the study of matter and how it changes
What determines an atom’s chemical properties?
the number of electrons in its nucleus
the number of neutrons in its nucleus
the number of electrons in its outermost shell
the number of protons in its outermost shell
the number of electrons in its outermost shell
Which of the following is a base?
vinegar
lemon juice
stomach acid
baking soda