When elements found in column VIA of the periodic table become ions, they usually have a charge of
A. -2.B. -1.C. +1.D. +2.E. +3.
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Question 2) Positively charged ions are called cations.
Indicate whether this statement is true or false.
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Question 3) An ion is an atom or group of atoms that has
A. a different number of neutrons than most atoms of that element.
B. lost or gained a proton.
C. lost or gained an electron.
D. a biological half-life due to radioactive decay.
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Question 4) The most common extracellular cation is ________.
Fill in the blank with correct word.
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Question 5) The molecular formula for bicarbonate ion is HCO3-. It is therefore a
A. polyatomic anion.B. polyatomic cation.C. radioactive isotope.D. cationic compound.
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Question 6) In general, the number of electrons that would fill an atom's outer shell and make it nonreactive is _______.
Fill in the blank with correct word.
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Question 7) Another name for the outer electron shell of an atom is the ________ shell.
Fill in the blank with correct word.
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Question 8) An atom with a positive or negative charge is known as a(n) ________.
Fill in the blank with correct word.
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Question 9) The half-life of a radioisotope is at least one day and at most ten years.
Indicate whether this statement is true or false.
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Question 10) Elements in the first column of the periodic table contain one electron in their outer shell.
Indicate whether this statement is true or false.
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