Difficulty of Carbon to Form a Stable Ion

Q. In the periodic table, carbon belongs to the category of _________.

1. noble gases
2. metals
3. nonmetals
4. metalloids

Q. If $E_1,E_2,E_{3}and{E}_4$ are the energies required to knock off the $1^{st},2^{nd},3^{rd}$ and $4^{th}$ electrons respectively from outermost orbit of the Carbon atom, choose the correct option:

1. $E_1$ < $E_2$ < $E_3$ > $E_4$
2. $E_1$ < $E_2$ < $E_3$ < $E_4$
3. $E_1$ > $E_2$ > $E_3$ > $E_4$
4. $E_1$ < $E_2$ > $E_3$ < $E_4$

Q. Octet rule states that elements tend to combine by losing, gaining or sharing electrons such that each atom has eight electrons in its valence shell. Why only 8 electrons?

1. Because elements with less than 8 valence electrons are more stable.
2. Because noble gases have 8 electrons in their valence shell.
3. Because elements with less than 8 valence electrons are less stable.
4. Both B and C.

Q. Which electron removal from the valence shell of a carbon atom requires the highest energy?

1. 2nd electron
2. 4th electron
3. 1st electron
4. 3rd electron

Q. Elements try to achieve octet configuration to attain stability.

1. True
2. False

Q. $C^{4-}$ is unstable because it would be very difficult for 6 protons to hold 10 electrons.

1. False
2. True

Q. According to octet rule, the number of electrons around each atom in an electronic dot structure of the compounds should always sum up to:

1. 5
2. 7
3. 4
4. 8

Q. Choose the element with correct dot structure.

1. None of the above
2. 
3. 
4. 

Q. How many valence electrons are present in carbon atom?

1. 6
2. 8
3. 4
4. 2

Q. What is the charge of carbon atom's nucleus?

1. + 4
2. - 4
3. - 6
4. + 6