Part I. (8 points) Multiple choice questions

Question 1: Which of the following species contains 16 neutrons.
A. $^{31}\text{P}$
B. $^{34}\text{S}^{2-}$
C. $^{36}\text{Cl}$
D. $^{80}\text{Br}^{-}$

Question 2: Which of the following statements is true
A. All elements in a period have the same number of electron shells
B. All elements in a period have the number of electrons in the outmost shell
C. The stable ions of all elements in a period have the same charge
D. Periods are vertical columns (down) the periodic table.

Question 3: The elements in groups 1A, 2A, and 6A are called, __________________, respectively.
A. alkaline earth metals, halogens, and chalcogens
B. alkali metals, alkaline earth metals, and chalcogens
C. alkali metals, halogens, and noble gases
D. alkaline earth metals, transition metals, and halogens

Question 4: Predict the charge of the most stable ion of potassium.
A. +3
B. -1
C. +2
D. +1

Part II. (2 points) Long answer question

Question 5: Are there how many protons, neutrons, and electrons in $^{131}\text{I}^{-}$. Explain your answer.