Review PS511 And PS512 Question Preview (ID: 10648)


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There are slightly more than one-hundred elements known to exist. The smallest complete unit of an element that serves as the basic building block of matter is the
a) atom
b) proton
c) neutron
d) nucleus

What charge does the proton give to the nucleus?
a) positve
b) negative
c) positive or negative depending of the number of electrons
d) Neither since the nucleus does not carry a charge, only atoms do

If an atom were to lose a neutron that atom's ________________ would be affected. Choose the best answer.
a) Mass
b) Charge
c) Mass and charge
d) Mass and atomic stablilty

Which of the following is false regarding the structure of atoms?
a) Most of the mass is in the nucleus.
b) Atoms are naturally electrically neutral.
c) The nucleus is a very small region of the atom
d) Losing a proton affects only an atom's mass and charge

__________________ surround the nucleus in shells or clouds.
a) Protons
b) Photons
c) Neutrons
d) Electrons

A typical carbon atom has six protons, six neutrons, and six electrons. Which of these has the least amount of mass?
a) One proton
b) One neutron
c) Six electrons
d) These masses are too tiny to measure

If an atom has six protons and four neutrons, what is its charge?
a) +2
b) +4
c) +6
d) More information is needed to answer this

If an atom has nine protons, eight neutrons, and ten electrons what is its charge?
a) -1
b) 0
c) +1
d) More information is needed to answer this

Helium has two protons, two neutrons, and two electrons. What is the charge of this atom?
a) 0
b) +2
c) +4
d) More information is needed

To find the atomic mass of a particular atom you need to know
a) The number of protons
b) The number of neutrons
c) The number of protons and neutrons
d) Simply what element that atom belongs to

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