Chemistry Practice Review Questions!
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(109).jpg "Chemistry Practice Review Questions!")
- 1.What is matter?
- A.
Anything that has electrons
- B.
Anything that has mass and is made of atoms
- C.
Anything that has energy
- D.
Anything that is classified as a compound
- 2.Atoms are mostly space.
- A.
True
- B.
False
- 3.Atoms contain which of the following?
- A.
Neutrinos, Protons, Electrons
- B.
Neutrons, Protons, Electrolytes
- C.
Neutrinos, Proteins, Electrolytes
- D.
Neutrons, Protons, Electrons
- 4.What are the charges of the following particles (in order): Protons, Neutrons, Electrons
- A.
Positive, Negative, Neutral
- B.
Negative, Positive, Neutral
- C.
Positive, Neutral, Negative
- D.
Neutral, Positive, Negative
- 5.What does the atomic number of an element tells us?
- A.
The number of protons in the atom
- B.
The number of neutrons in the atom
- C.
Which group of the periodic table it is in
- D.
The number of valence electrons it has
- 6.A atom or molecule that has gained electrons to become negatively charged is called a ________?
- 7.The Valence of an atom tells us what?
- A.
How many protons it has
- B.
How many bonds it can form
- C.
Whether it has a charge or not
- D.
If it is a metal or non-metal
- 8.Which of the following ideas of John Dalton are still believed to be correct?
- A.
Atoms are solid.
- B.
Atoms in an element are all the same type of atom.
- C.
Atoms cannot be split into smaller particles.
- 9.Earnest Rutherford came up with the "Small Nucleus" model of the atom by firing positively charged particles at gold foil. What did he measure in this experiment?
- A.
How fast the particles traveled
- B.
How many of the particles were absorbed
- C.
How the particles were deflected
- D.
How many of the particles became negatively charged
- 10.How did Bohr change Rutherford's model of the atom?
- A.
He said that the electrons were concentrated in the centre of the atom (nucleus)
- B.
He said that electrons could only occupy specific energy levels as they orbit the nucleus
- C.
He said that the electrons could orbit the nucleus in a completely random way.
- 11.Mass number = the number of protons + the number of __________
- 12.An atom of magnesium has an atomic number of 12 and a mass number of 24. How many protons, neutrons, and electrons does it contain?
- A.
12 protons, 24 neutrons, and 12 electrons
- B.
12 protons, 12 neutrons, and 12 electrons
- C.
24 protons, 24 neutrons, and 12 electrons
- D.
24 protons, 24 neutrons, and 24 electrons
- 13.
![What is the atomic number of the atom below?
- ProProfs]( "What is the atomic number of the atom below?")
What is the atomic number of the atom below? - 14.
![What is the Mass number of the atom below?
- ProProfs]( "What is the Mass number of the atom below?")
What is the Mass number of the atom below? - 15.
![In the diagram below p = proton, n= neutron and the red dots are electrons.
Each of these atoms represent a different element. - ProProfs]( "In the diagram below p = proton, n= neutron and the red dots are electrons.
Each of these atoms represent a different element.")
In the diagram below p = proton, n= neutron and the red dots are electrons. Each of these atoms represent a different element.- A.
True
- B.
False
- 16.Isotopes are formed when an atom has the same number of protons but a different number of ______
- A.
Electrons
- B.
Neutrons
- C.
Particles
- D.
Quarks
.jpg "What is the atomic number of the atom below?")
.jpg "In the diagram below p = proton, n= neutron and the red dots are electrons.
Each of these atoms represent a different element."){kind=tracking}
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