Argon has 18 protons. How many electrons are in its third energy level?
A) 2
B) 4
C) 6
D) 8
E) 10
Correct Answer:
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Q9: In the chemical shorthand,14C,the 14 represents the
Q10: The nucleus of an atom contains _.
Q18: What is the primary reason for the
Q19: All isotopes of an element have a
Q19: Radioactive isotopes have _.
A) excess electrons
B) excess
Q22: A salt will dissolve in water to
Q23: The column of water extending in tubes
Q23: Atoms become _ in order to achieve
Q26: When exposed to water,sodium chloride (NaCl)_.
A)
Q28: Which statement is false?
A) A molecule
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