Worksheetsbiochem quiz #1 review
Total questions: 19
Worksheet time: 10mins
Phenolphthalein turns pink to indicate what is present?
acid
base
oxygen
water
Which term describes a mixture that is unevenly mixed?
homogeneous
heterogeneous
solution
solute
A substance with a pH of 2 is classified as
acid
base
neutral
indicator
Two or more different elements chemically combined form
an element
an acid
an atom
a compound
In a salt water solution, the salt would be the
solute
solvent
acid
base
Atoms with the same number of protons, but a different number of neutrons, such as C-12 and C-14 are called
ions
elements
compounds
isotopes
A charged atom with an unequal number of protons and electrons, such as Na+, is called
an isotope
an ion
an element
a compound
What does the atomic mass number represent?
protons
neutrons
protons + neutrons
protons + electrons
What does the atomic number represent?
protons
neutrons
protons + neutrons
protons + electrons
Which subatomic particle is located outside the nucleus?
protons
neutrons
electrons
ions
What are the three subatomic particles and their respective charges?
proton -, electron neutral, neutron +
proton neutral, electron +, neutron -
proton +, electron -, neutron neutral
proton +, electron neutral, neutron -
What is the smallest particle of an element?
cell
electron
atom
molecule
Which element is NOT one of the four main elements of life?
Helium
Carbon
Hydrogen
Oxygen
What is defined as anything that has mass and takes up space?
matter
volume
solid
cytoplasm
What is the pH number of a neutral substance?
0
6
7
14
What ion do acids produce in solution?
OH-
Na+
Cl-
H+
What ion do bases produce in solution?
OH-
Na+
Cl-
H+
What type of bonding involves the transfer of electrons?
covalent
ionic
What type of bonding involves the sharing of electrons?
ionic
covalent
