What is the number of protons in a neutral atom with 31 electrons and 38 neutrons?

31

I think. Protons and electrons share the same number as well as the atomic number.

31 protons

Explanation:

Protons are positively charged and electrons are negatively charged so if it is a neutrally charged atom (which most are) the protons and electrons will be equal.

8 carbon atoms forming single bonds with 18 hydrogen atoms; a triple bond exists between the third and fourth carbon atom from the right

explanation: