Radioactivisotopes have
A) excess electrons.
B) excess protons.
C) excess neutrons.
D) insufficient neutrons.
E) insufficient protons.
Correct Answer:
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Q28: Which of thfollowing statements is NOT true?
A)All
Q29: Which chemical bonds arfounwithin water molecules?
A)hydrogen
B)ionic
C)covalent
D)inert
E)single
Q30: How many electrons arin thseconelectron shell of
Q31: An atom
A)is positively charged.
B)is negatively charged.
C)is electrically
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Q34: _ bonds holmolecules of DNA in their
Q35: Thbonin tablsalt (NaCl) is
A)polar.
B)ionic.
C)covalent.
D)double.
E)nonpolar.
Q36: Which of thfollowing statements is TRUE?
A)Chemical bonds
Q37: How many electrons arin thinnermost electron shell
Q38: A(n) _ is a typof chemical bonin
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