WorksheetsChemistry Midterm Study Guide 2021
Total questions: 16
Worksheet time: 9mins
An atom's atomic number represents the
number of neutrons
number of protons
number of electrons
number of voltrons
Strontium fluoride (SrF2) is classified as a(n):
element
compound
heterogeneous mixture
homogeneous mixture
Water (H2O) is classified as a(n):
element
compound
heterogeneous mixture
homogeneous mixture
Corn flakes would be classified as a(n):
element
compound
heterogeneous mixture
homogeneous mixture
Tungsten (W) would be classified as a(n):
element
compound
heterogeneous mixture
homogeneous mixture
Which would be an example of a chemical change?
boiling salt water
sanding wood
mixing vinegar and baking soda
breaking glass
Which would be an example of a physical change?
rotting banana
fireworks
crushing a can
digesting food
An ion is an example of:
an atom that has lost electrons
an atom that has gained electrons
an atom that has gained protons
an atom that has lost protons
Which atom below would be an isotope of sodium with a mass number of 23?
atomic number: 12, # of neutrons: 11, # of electrons: 6
atomic number: 11, # of neutrons: 6, # of electrons: 6
atomic number: 11, # of neutrons: 11, # of electrons: 12
atomic number: 11, # of neutrons: 12, # of electrons: 11
An atom's nucleus is
positively charged
negatively charged
neutral (not charged)
constantly charging
The number 13 in carbon-13:
tells us that this carbon isotope has a mass number of 13.
tells us that this carbon isotope has 13 electrons around the nucleus.
tells us that this carbon isotope has 6 protons and 7 neutrons.
tells us that this carbon isotope has 7 protons and 6 neutrons.
How many valence electrons does oxygen have?
16
6
8
3
Magnesium is a(n):
alkali metal and very reactive
halogen and very reactive
alkali earth metal and reactive
noble gas and very unreactive
Lithium is a(n):
alkali metal and very reactive
halogen and very reactive
alkali earth metal and reactive
noble gas and very unreactive
How many valence electrons do alkali metals have?
7
3
2
1
Elements that have similar properties are located:
in the same group
in the same period
