Question

question 6
why is carbon chemically important? (select all that apply)
a carbon can easily bond with itself to form long chains
b carbon can easily bond with hydrogen, oxygen, nitrogen, phosphorus and sulfur
c carbon has 4 valence electrons
question 7
which of the following is a type of bond in which two pairs (4 electrons) are shared between two atoms?
a triple bond
b double bond
c single bond

Explanation:

For Question 6: Carbon's ability to form long - chains with itself (A), bond with other common elements (B), and having 4 valence electrons (C) all contribute to its chemical importance. For Question 7: A double bond involves the sharing of two pairs (4 electrons) between two atoms. A triple bond shares three pairs and a single bond shares one pair.

Answer:

Question 6: A. carbon can easily bond with itself to form long chains, B. carbon can easily bond with hydrogen, oxygen, nitrogen, phosphorus and sulfur, C. carbon has 4 valence electrons
Question 7: B. double bond