Question 1 (10 points) In carbon tetrafluoride there are ____ valence electrons.

Question

Question 1 (10 points)

In carbon tetrafluoride there are ____ valence electrons.

Question 1 options:

28

32

4

16

Question 2 (10 points)

There are 4 single bonds and 12 lone pairs of electrons in carbon tetrafluoride.

Question 2 options:

Question 3 (10 points)

There are 2 single bonds and 2 lone pairs of electrons in dihydrogen sulfide.

Question 3 options:

Question 4 (10 points)

In the carbonate ion, there are ____ valence electrons.

Question 4 options:

18

22

24

26

20

Question 5 (10 points)

The carbonate ion has a 2- charge because each oxygen atom has a negative charge.

Question 5 options:

Question 6 (10 points)

The carbonate ion (carbon is the central atom) may display ____ single bond(s) and ____ double bond(s).

Question 6 options:

1,2

2, 1

2,2

0,3

Question 7 (10 points)

Phosphorus trifluoride has ___ single bonds and ____ lone pairs of electrons.

Question 7 options:

3, 6

2, 12

3, 10

3, 9

Question 8 (10 points)

Boron trifluoride violates the octet rule because:

Question 8 options:

the boron does not have a complete octet

the boron has more than a complete octet

the fluorine atoms do not have a complete octet

the fluorine atoms have more than a complete octet

Question 9 (10 points)

Dioxygen has ___ single bond, _____ double bond, ____ triple bond and ___ lone pairs of electrons.

Question 9 options:

0, 1, 0, 2

0, 0, 1, 2

1, 0, 1, 4

0, 1, 0, 4

Question 10 (10 points)

The most stable form for the nitrate ion shows:

Question 10 options:

9 lone pairs, one double bond, 3 single bonds, a positive formal charge on the nitrogen and one negative formal charge on 2 of the oxygen atoms.

8 lone pairs, one double bond, 2 single bonds, a positive formal charge on the nitrogen and one negative formal charge on 2 of the oxygen atoms.

9 lone pairs, one double bond, 2 single bonds, a positive formal charge on the nitrogen and one negative formal charge on 2 of the oxygen atoms.

8 lone pairs, no double bond, 3 single bonds, a positive formal charge on the nitrogen and one negative formal charge on 2 of the oxygen atoms.

28

32

4

16

Explanation / Answer

1) CF4 = there are 7 valence electron on each F and 4 electron on C, so total = 7x4 + 4 = 32

2) There are 3 lone pair on each F atom, so there are 12 lone pair and the carbon forms 4 bonds

so the statement is TRUE

3) TRUE : Sulphur has 2 lone pair and there are 2 single bonds

4) Carbonate = CO3-2 :

Carbon has 4 valence electrons , each oxygen has 6 valence electron

2 electrons are taken by oxygen atom, so TOTAL valence electron = 2 + 6x3 + 4 =24

5) Carbonate = CO3-2 :   from the formula , its obvious its TRUE

6) carbonate ion has two single bonds and 1 double bond

Please post the remaining questions separatley

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.