Which of thfollowing statements is NOT true?
A) All isotopes of an element have the same number of electrons.
B) All isotopes of an element have the same number of protons.
C) All isotopes of an element have the same number of neutrons.
D) All radioactive isotopes are unstable.
E) All isotopes of an element have the same atomic number.
Correct Answer:
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Q23: Which of thfollowing statements is (are) TRUabout
Q24: How many protons arin thnucleus of a
Q25: Electrons arsharein bonds called
A)covalent bonds.
B)ionic bonds.
C)polar bonds.
D)nonpolar
Q26: Phosphorus has _ vacancies.
A)1
B)2
C)3
D)5
E)8
Q27: An atothat carries a chargis callea(n)
A)ion.
B)molecule.
C)compound.
D)element.
E)microelement.
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
Q32: How many electrons arin thoutermost electron shell
Q33: Radioactivisotopes have
A)excess electrons.
B)excess protons.
C)excess neutrons.
D)insufficient neutrons.
E)insufficient protons.
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