All About Atoms Question Preview (ID: 1223)

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Where are protons found in an atom?
a) In the nucleus
b) around the nucleus
c) in the electron cloud
d) outer energy levels

How many electrons are on the second energy level?
a) 2
b) 16
c) 32
d) 8

What is the charge of an neutron?
a) positvely charged
b) negatively charged
c) neutrally charged
d) none of the above

Which of the following causes an object to have a negative charge?
a) Neutrons are removed
b) Electrons are added
c) Electrons are removed
d) protons are added

Which of the following accurately compares the masses of neutrons and protons?
a) mass of 1 neutron = mass of 1 proton
b) mass of 2000 neutrons = mass of 1 proton
c) mass of 1 electron = mass of 1 proton
d) mass of 1 neutron = mass of 1 electron

What did Rutherford conclude from his gold foil experiment?
a) An atom's negative charge is in its nucleus
b) Thomson's model of the atom was correct
c) An atom's positive charge is in its nucleus
d) An atom's positive charge is spread evenly throughout the atom

How many energy levels is/are needed for a lithium atom's three electrons when the atom is in its ground state?
a) zero
b) one
c) two
d) three

Which of the following is true about carbon - 12?
a) It has 8 protons and 8 neutrons
b) Scientists assigned a mass of 6 atomic mass units to the carbon- 12 atom
c) It is used as a standard for comparing the atomic numbers of atoms.
d) An atomic mass unit is defined as one - twelfth the mass of a carbon -12 atom

In a neutral atom, the number of protons is equal to the number of electrons. What is overall charge if the atom loses an electron?
a) static
b) neutral
c) negative
d) positive

Which model of the atom can be compared with the orbit of the planets around the sun?
a) Bohr's model
b) Thompson's model
c) Rutherford's model
d) electron - cloud model

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