Flourine has an atomic number of 9. You would expect fluorine would like to do which of the following?
give up all seven electrons, acquiring a positive charge
to be nonreactive with other atoms
to accept an electron from another atom, acquiring a negative charge
to give up four of its electrons, acquiring a positive charge
The Correct Answer is C
A. give up all seven electrons, acquiring a positive charge: Fluorine has 7 valence electrons and needs 1 more to complete its outer shell; it’s unlikely to give up 7.
B. to be nonreactive with other atoms: Nonreactive atoms have full outer shells, like noble gases. Fluorine is highly reactive.
C. to accept an electron from another atom, acquiring a negative charge: Fluorine is highly electronegative, so it gains 1 electron, becoming a negative ion (anion).
D. to give up four of its electrons, acquiring a positive charge: Fluorine doesn’t have four valence electrons to give; it wants one more, not to lose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. isotonic; nothing: Isotonic means equal solute concentration. 0.9% NaCl is isotonic; 9.0% is much higher, so not isotonic.
B. hypotonic; crenation: A hypotonic solution has less solute than the cell. Crenation (shriveling) occurs in a hypertonic solution.
C. hypertonic; crenation: A 9.0% NaCl solution is hypertonic (more solutes than inside the cell). Water moves out of red blood cells, causing them to shrink or crenate.
D. hypertonic; lysis: Lysis (bursting) occurs in hypotonic solutions, where water enters the cell.
Correct Answer is C
Explanation
A. osmosis: Osmosis is passive (requires no energy), so it will still occur even if mitochondria are poisoned.
B. facilitated diffusion: Facilitated diffusion uses transport proteins but does not require ATP-still functional without mitochondria.
C. active transport: Active transport requires ATP, which is produced by the mitochondria. Blocking mitochondria interrupts ATP production, halting active transport.
D. through channels: Movement through ion channels is usually passive (e.g., diffusion), and does not require ATP.
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