SE #1 Review 1 Question Preview (ID: 22708)
Semester Exam Review 8th Grade.
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A substance has good conductivitiy, is malleable and is ductile. What type of substance is it?
a) Gas
b) Metal
c) Non-metal
d) Liquid
Do the air molecules in a ball have more kinetic energy when it is flat in the morning, or when it is more full in the afternoon?
a) In the morning
b) In the afternoon
c) The kinetic energy remains the same
d) The ball has no kinetic energy
Which statement about solid matter is true?
a) Atoms of a substance have greater kinetic energy in the solid than the gas phase
b) Atoms of most substances are slightly closer together in the soid than the liquid phase
c) Atoms in the solid phase have enough kinetic energy to completely separate
d) Atoms of a substance in the solid phase take the shape of the container holding the solid
Which statement about matter in the gas phase is true?
a) Atoms of a substance move more freely in the liquid than the gas phase
b) Atoms of a gas are locked together in a rigid structure and cannot flow
c) Atoms of a substance in the gas phase cannot be compressed into smaller spaces
d) Atoms in the gas phase have enough kinetic energy to separate completely
Which statement about liquid matter is true?
a) Atoms of a liquid do not have enough kinetic energy to move around each other
b) Atoms of a liquid are locked together in a rigid structure and cannot flow
c) Atoms of a substance are closer together in the liquid than the gas phase
d) Atoms of a substance in the liquid phase can be compressed into a smaller volume
Which of these substances is made up of particles which have the greatest average kinetic energy?
a) Melting ice
b) Solid ice
c) Cool water
d) Warm water
How does the average kinetic energy of the particles making up ice change after ice melts?
a) Kinetic energy decreases
b) Kinetic energy increases
c) Kinetic energy randomly changes
d) Kinetic energy does not change
Compare the average kinetic energy of particles in ice to those in liquid water
a) The kinetic energy cannot be compared
b) The kinetic energy is greater in ice than liquid
c) The kinetic energy is greater in liquid than ice
d) The kinetic enegy is equal
In a chemical reaction, an atom of Lithium loses an electron and an atom of Chlorine gains an electron. Which statement is true?
a) These ions will neither attract nor repel each other
b) These particles will have the same charge
c) The Lithium and Chloride ions will repel each other
d) The Lithium and Chloride ions will be attracted to each other
Which statement about the structure of an atom is true?
a) Protons and electrons are roughly equal in mass
b) A proton cloud surrounds each atom
c) An electron cloud surrounds each atom
d) Neutrons are NOT found in the atomic nucleus
Two particles move in opposite directions from each other. Which property of these particles could cause this to happen?
a) The particles are equal in volume
b) The particles have the same electrical charges
c) The particle is 100 times more massive than the other
d) The particles have opposite electrical charges
Sulfur has 16 protons, 16 neutrons, and an atomic mass of 32. How many electrons does it have?
a) 16
b) 32
c) 48
d) 8
Oxygen has 8 protons, 8 electrons, and an atomic mass of 16. How many neutrons does it have?
a) 4
b) 12
c) 8
d) 16
Aluminum has 13 electrons, 14 neutrons, and an atomic mass of 27. How many protons does it have?
a) 41
b) 14
c) 13
d) 27
What is the atomic mass of Silicon?
a) 42
b) 28
c) 14
d) 70
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