Instability of radioisotopes is causeby
A) sudden temperature variations.
B) environmental humidity.
C) the random motion of atoms.
D) the disintegration of a neutron into a proton and an electron.
E) the motion of electrons and neutrons.
Correct Answer:
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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
Q40: In _ bonds, atoms sharelectrons equally.
A)double covalent
B)unstable
Q41: A _ is a compounthat releases ions
Q43: Which of thfollowing represents H+?
A)hydrogen ions
B)acid
C)base
D)hydroxyl ion
E)acceptor
Q44: A hydrogen bonis
A)a sharing of a pair
Q63: A pH of 10 is how many
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