The prefix thio- denotes
A) replacement of an oxygen atom by a sulfur atom.
B) a sulfursulfur double bond.
C) sulfur in a negative oxidation state.
D) a sulfuroxygen double bond.
E) an allotropic form of sulfur.
Question 2
The ions Ca2+ and PO43- form a salt with the formula ________.
A) CaPO4
B) Ca2(PO4)3
C) Ca2PO4
D) Ca(PO4)2
E) Ca3(PO4)2
Question 3
What is the mass in grams of 9.76 1012 atoms of naturally occurring potassium?
A) 2.41 1012
B) 2.50 1011
C) 6.34 10-10
D) 1.62 10-11
E) 3.82 1014