This is an incomplete question, here is a complete question.
Suppose you conducted a similar experiment using helium gas. Given that helium is much lighter than the gases used in this lab, you would expect the relationship between the volume of helium and the pressure to be
A. periodic, because helium is lighter.
B. inversely proportional, just like propane and butane.
C. exponential, because helium is lighter.
D. directly proportional, just like propane and butane.
Answer : The correct option is, (B) inversely proportional, just like propane and butane.
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
That means, there is a inverse relation between volume of pressure.
From the given options we conclude that the correct statement is, inversely proportional, just like propane and butane.
Hence, the relationship between the volume of helium and the pressure to be inversely proportional, just like propane and butane.
Answer: D) It has two more electrons than protons.
Explanation: Sulphur (S) is an element with atomic number 16 and thus contains 16 electrons. A neutral atom contains equal number of protons and electrons.
An atom on losing electrons gains positive charge and on gaining electrons gain negative charge.
Sulphide ion is formed by gaining 2 electrons to attain stable configuration of argon and thus contains two more electrons than protons.