1) Why can tin form two different ions? a) Tin can gain or lose electrons to for

Question

1) Why can tin form two different ions?

a) Tin can gain or lose electrons to form an anion or a cation.
b) Tin can gain a variable number of electrons to form two or more different anions.
c) Tin can lose a variable number of electrons to form two or more different cations.
d) Tin only forms one type of cation.
e) Tin does not form any ions.

2) Silicon dioxide is a covalently bonded molecule. In this molecule, the number of electrons that silicon shares with the oxygen atoms is equal to the number of electrons

a) in its nucleus.
b) in all the atoms.
c) needed to give it a noble gas arrangement.
d) in its ion.
e) in the atom.

3) Which of the following bonds would you predict to be ionic?

a) C-P
b) Rb-Br
c) Br-P
d) S-F
e) C-H

4) Which is the overall charge of a polyatomic ion?

a) Polyatomic ions do not have an overall charge.
b) It is negative.
c) It is positive.
d) It may be negative or positive.
e) Too little information is given to tell.

5) Trevon has a balloon that contains 0.01 mole of helium. How many particles of helium are in the balloon?

a) 6.02
b) 3.01

Explanation / Answer

1.c

2.c

3.Rb-Br

4.d

5.(0.01*6.02*10^23= 6.02*10^21)

6.d

7.b

8.a

9.0.15* 480 = V*3

= .05*480 = V

=24ml

10 . 0.75 moles

molarity = moles / volume

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