Font size
Worksheets8th Grade Science Midterm
Total questions: 40
Worksheet time: 40mins
Which state of matter has both definite shape and definite volume?
Solid
Liquid
Gas
Plasma
Neither
Which state of matter has definite shape and no definite volume?
Solid
Liquid
Gas
Plasma
Neither
Which state of matter has no definite shape and no definite volume?
Solid
Liquid
Gas
Which state of matter has the fastest moving particles?
Solid
Liquid
Gas
Kinetic energy doesn't change
Which of these do NOT reside in the nucleus of an atom?
Protons
Neutrons
Electrons
Slow vaporization is called ___________. Fast vaporization is called ___________.
Evaporation; Boiling
Boiling; Evaporation
What is the change from a gas to a liquid?
Sublimation
Condensation
Vaporization
Deposition
Precipitation
What is the change from a solid directly to a gas?
Sublimation
Condensation
Vaporization
Precipitation
Deposition
What is the change from a gas directly to a solid?
Sublimation
Condensation
Vapoization
Precipitation
Deposition
The amount of matter changes when there is a change of state.
True
False
Ionize means to convert an atom into an ion by ___________ one or more electrons
Gaining
Losing
Gaining or losing
Which has no define shape and no definite volume (can select multiple answers).
Solid
Liquid
Gas
Plasma
Neither
___________ molecules have the same amount of kinetic energy and temperature. ____________ molecules can have different KE and temperatures.
Gas; Plasma
Plasma; Gas
________ has/have a very low conductivity. _________ has/have an extremely high conductivity.
Gas; Plasma
Plasma; Gas
The atomic number of an element is found where?
At the top of the element
At the bottom of the element
The atomic mass of sodium (Na) is 22.989 g/mol. What is its mass number?
22.989
23
11
12
The molar mass of an element is found where?
At the top of the element
At the bottom of the element
The molar mass of Zirconium is 91.224 g/mol. What is Zirconium's atomic number?
91
92
91.224
40
How many electrons are in the SECOND electron shell?
2
8
10
16
The mass number is equal to the number of:
neutrons + electrons
neutrons + protons
protons + electrons
neutrons
When neutral (no charge), atoms have the same number of protons, neutrons, and electrons.
True
False
Pictured is a Bohr model of phosphorus. How many electrons does this element have? How many valence electrons does it have?
15 electrons, 5 electrons
15 electrons, 8 electrons
16 electrons, 5 electrons
8 electrons, 8 electrons
Pictured is a Bohr model of oxygen. How many protons does this element have?
8 protons
2 protons
6 protons
16 protons
The gas laws DO NOT involve:
Temperature
Pressure
# of moles
Volume
The gas laws involve all of these.
What units became constants when converting between the Ideal Gas Law and Boyle's Law? (Select multiple answers)
Pressure
Volume
Temperature
Number of moles
R (ideal gas law constant)
In Boyle's Law, as volume increases, pressure __________.
increases
decreases
stays the same
Which grouping of elements acts like both metals and non-metals?
Transition metals
Metalloids
Halogens
Noble gases
Group 2 elements
For groups 13-18, how do you determine how many valence electrons are in the element?
Subtract 10 from the group number
It is the group number
Look at the atomic number
Look at the atomic mass
Which group is in a step-like pattern on the periodic table?
Halogens
Noble gases
Metalloids
Transition metals
Lanthanides
Reactivity ________ going left to right along the periodic table.
increases
decreases
Which metals are known to give off magnetic fields?
Cobalt
Iron
Zinc
Sodium
Nickel
Which is more reactive?
Group 1 elements
Group 2 elements
If oxygen has 6 electrons, how many does it need to become stable?
1
2
8
6
3
Rank these in order of bond strength from weakest to strongest.
Single bonds -> Double bonds -> Triple bonds
Triple bonds -> Double bonds -> Single bonds
Which group on the periodic table has a full set of valence electrons?
Lanthanides and Actinides
Halogens
Noble gases
Alkali metals
What are the 3 types of chemical bonds?
Iconic Bonds
Ionic Bonds
Metallic Bonds
Compound Bonds
Covalent Bonds
Compounds and the elements that make them up often have ____________________ properties.
the same
different
stable
unstable
similar
How many oxygen atoms are in the compound?
2
3
6
8
1
How many carbon atoms are in the compound CH4?
0
1
4
5
How many total atoms are in the pictured compound?
6
12
18
22
24
