Help would be appreciated :) Answer the following questions about Carbon (as a neutral, typical carbon atom):

a. What is a carbon atom's mass?

b. How many protons does a stable carbon atom have?

c. How many electrons does a carbon atom have?

d. How many neutrons does a stable carbon atom have?​

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive