8.5A Question Preview (ID: 49261)
Atoms.
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Which subatomic particle is attracted to the nucleus?
a) proton
b) neutron
c) electron
d) none of the above
How can you calculate the atomic mass of an element?
a) Add the protons and neutrons
b) Subtract the electrons from the protons
c) Add the protons and the nucleus
d) Add the protons and the electrons
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) -2
b) 2
c) +4
d) +2
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 increase by 1.
b) The atomic mass will increase by 1.
c) The atomic number will decrease by 1.
d) The atomic number will stay the same and the atom will become negatively charged.
Which subatomic particles make up the mass of an atom?
a) protons
b) protons and neutrons
c) neutrons
d) protons and electrons
If an atom has 12 protons, 13 neutrons, and 12 electrons, what is the charge of the atom?
a) +1
b) -1
c) 0
d) +2
Which statement best describes the nucleus of the atom?
a) It is centrally located and contains almost all of the atomic mass and has an overall neutral 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 located in the electron cloud and contains almost all of the atomic mass and has an overall positive charge.
An element has 27 protons, 27 electrons, and 32 neutrons. What is the atomic mass?
a) 27
b) 32
c) 5
d) 59
A group of students examines Bohr structure diagrams of various atoms and a periodic table. Which hypothesis is most accurate?
a) Elements in the same period on the Periodic Table have similar properties.
b) The atomic mass of an atom is determined by the number of protons and neutrons.
c) The valence number of an atom determines the density of the atom.
d) The atomic number of an atom is determined by the number of neutrons.
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 three different colors of marshmallows to represent the subatomic particles in the model.
b) Use only lima beans, draw a + sign on the protons, a 0 on the neutrons, and a - on the electrons
c) Use rice grains to represent the electrons in the model
d) Use cotton balls to represent electrons in the model
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