Question 1: Circle the correct answer.
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1. Why do atoms have no charge (electrically neutral)?
a. The number of protons is equal to the number of neutrons.
b. The number of electrons is equal to the number of neutrons.
c. The number of protons is equal to the number of electrons.
d. There is an equal number of neutrons, protons, and electrons.
2. The number of electrons in an atom can be determined from the
element.
a. atomic mass
b. mass number
of the
c. atomic number
d. bonding number
3. Electrons in an atom are organized _____________________.
a. in energy levels.
b. in nuclei.
c. in chains.
d. None of the above
4. The levels farther from the nucleus contain electrons that have
to the nucleus.
a. less energy than
b. half the energy of
levels closer
c. the same energy as
d. more energy than
5. Electrons will enter the second energy level after the ______________ electron enters the
first energy level.
a. third
b. forth
c. second
d. first
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Question 2: Fill in the table about the element below.
Name of the element
_____________________
Atomic number
_____________________
Electronic configuration
Number of valence
electrons
_____________________
[5]
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