Chapter 2 in class problems

Question 1

1. Identify the following information about the carbon atom:
   A) symbol
   B) atomic number
   C) number of protons and electrons
   D) highest and lowest possible oxidation states
   E) molar mass

Answer 1

A) symbol - C
B) atomic number- 6
C) number of protons and electrons - P= 6, E = 6
D) highest and lowest possible oxidation states: Highest = 2+, Lowest = 6-
E) molar mass = 12.009

Question 2

2. How many protons, neutrons, and electrons are in an atom of 199 80Hg? (80 is in the bottom left) (199 is in the top right)

Answer 2

Protons = 80, Electrons = 80, Neutrons = 119

Question 3

What is the symbol of the atom obtained when three protons and three neutrons are added to 14C? (14 is on the top right)

Answer 3

F 20

Question 4

Go to question 4 on the in class problems for chapter 2 and complete it (the one with the table)

Question 5

5. Provide the symbol of the isotopes given below:
   (a) Z = 72 and A = 174
   (b) Z = 42 and A = 98

Answer 5

A: Hf
B: Mo

Question 6

6. Consider the 122Sb atom. If a single neutron is added to this atom, will the new atom be an isotope of 122Sb or not?

Answer 6

Yes they would be isotopes

Question 7

. The natural isotopes of chlorine are listed below:
* 35Cl, 75.78%, 34.968 amu
* 37Cl, 24.22%, 36.965 amu
Calculate the atomic weight of chlorine.

Answer 7

35.452

Question 8

9. A specific element is a colorless, inert gas at room temperature. Which statement is true regarding the element?
   a) element is a metal
   b) element is a nonmetal
   c) element is a semimetal

Answer 8

B element is a nonmetal

Question 9

7. In the following ions, what is the identity of element X?
   (a) X− (anion, 18 electrons)
   (b) X+ (cation, 18 electrons)

Answer 9

A Chlorine (bc it originally had 17)
B Potassium (bc it originally had 19)