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8.5A
Test Description: Atoms
Instructions: Answer all questions to get your test result.
1) If an atom has 12 protons, 13 neutrons, and 12 electrons, what is the charge of the atom?
A
0
B
+2
C
-1
D
+1
2) Which statement best describes the nucleus of the atom?
A
It is located in the electron cloud and contains almost all of the atomic mass and has an overall positive charge.
B
It is centrally located and contains almost none of the atomic mass and has an overall positive charge.
C
It is centrally located and contains almost all of the atomic mass and has an overall positive charge.
D
It is centrally located and contains almost all of the atomic mass and has an overall neutral charge.
3) An element has 27 protons, 27 electrons, and 32 neutrons. What is the atomic mass?
A
32
B
27
C
59
D
5
4) A group of students examines Bohr structure diagrams of various atoms and a periodic table. Which hypothesis is most accurate?
A
The atomic number of an atom is determined by the number of neutrons.
B
The valence number of an atom determines the density of the atom.
C
Elements in the same period on the Periodic Table have similar properties.
D
The atomic mass of an atom is determined by the number of protons and neutrons.
5) Groups of students built models of atoms using macaroni to represent protons, beans to represent neutrons, and marshmallows to represent electrons. How can the model be improved to be more accurate of the actual size of each subatomic particle
A
Use cotton balls to represent electrons in the model
B
Use three different colors of marshmallows to represent the subatomic particles in the model.
C
Use rice grains to represent the electrons in the model
D
Use only lima beans, draw a + sign on the protons, a 0 on the neutrons, and a - on the electrons
6) A student is given a diagram of an atom with 3 protons and 3 electrons. Which statement describes the atom if another electron is added to the diagram?
A
The atomic number will stay the same and the atom will become negatively charged.
B
The atomic number will increase by 1.
C
The atomic mass will increase by 1.
D
The atomic number will decrease by 1.
7) Which subatomic particles make up the mass of an atom?
A
protons and neutrons
B
protons and electrons
C
neutrons
D
protons
8) Which subatomic particle is attracted to the nucleus?
A
proton
B
neutron
C
electron
D
none of the above
9) How can you calculate the atomic mass of an element?
A
Add the protons and neutrons
B
Add the protons and the nucleus
C
Subtract the electrons from the protons
D
Add the protons and the electrons
10) In a neutral Calcium atom, there are 20 protons, 20 neutrons, and 20 electrons. If the Calcium atom loses two electrons, what will be the charge of the Calcium atom?
A
+4
B
-2
C
+2
D
2
*select an answer for all questions
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