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Which is a property of a neutron?
A) 0 charge
B) +1 charge
C) -1 Charge
D) Essentially no mass
2)
In an electrically neutral atom of any element, there are equal numbers of
A) protons and neutrons.
B) electrons and protons.
C) electrons and neutrons.
D) atomic number and atomic mass.
3)
Which sub-atomic particle is positively charged and found in the nucleus?
A) proton
B) neutron
C) electron
D) beta particle
4)
Which part of the atom cannot have its location accurately determined and is modeled by a cloud around the center of the atom?
A) electron
B) neutron
C) nucleus
D) proton
5)
Which subatomic particle is NOT found at the center of the atom?
A) electron
B) neutron
C) nucleus
D) proton
6)
What is the number of protons in an atom of sodium?
A) 11
B) 11.9897
C) 12
D) 23
7)
An atom of the element ____________has an average atomic mass of about 16 amu.
A) oxygen
B) sulfur
C) nitrogen
D) no elements have that mass
8)
Describe the structure of an atom.
A) The nucleus is the dense center of the atom composed of protons and neutrons. Surrounding the nucleus is an electron cloud composed of electrons.
B) The nucleus is the dense center of the atom composed of electrons and neutrons. Surrounding the nucleus is an electron cloud composed of protons.
C) The electron cloud is the dense center of the atom composed of electrons. Surrounding the electron cloud is a nucleus composed of protons and neutrons.
D) The electron cloud is the dense center of the atom composed of protons and neutrons. Surrounding the electron cloud is a nucleus composed of electrons.
9)
Which part of the diagram represents the nucleus?
A) A
B) B
C) C
D) D
10)
Electrons are modeled using a "cloud" around the nucleus because they
A) can not be precisely located.
B) travel at the speed of light.
C) exist in many places at once.
D) move in an orbit about the nucleus.