Question

Please use the Interactive Periodic Table linked here to locate and identify the average atomic masses for the element below. Recall from unit 3, the mass number is the average of ALL of the element's isotopes and it accounts for the protons and neutrons found in the atom's nucleus. Not all choices will be used. Select one mass per element.(6 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Magnesium, Mg Molybdenum, Mo Neodymium, Nd Thallium, Tl Selenium, Se Fluorine, F
Question 2
Fluorine, F, is what we call a "molecular element" that must exist as F2
. Using the mass from the interactive periodic table, calculate the molar mass, of one mole of F2
. State your final answer in the blank. Please carry your answer out to the tenths place, or one decimal. The units of g/mol are listed for you.(1 point)
g/mol
Question 3
For this question, please select the best answer for the molar mass of magnesium fluoride, MgF2
. You can use the interactive periodic table or your work above to solve this. (1 point)
Responses

92.94 g/mol
92.94 g/mol

159.8 gmol
159.8 gmol

62.31 g/mol
62.31 g/mol

67.62 g/mol
67.62 g/mol
Question 4
Suppose there exists a compound called thallium (III) fluoride, TlF3
used in manufacturing metal from ores for industrial and engineering purposes. How many total atoms can be found in one formula unit of this compound?(1 point)
Responses

1
1

2
2

3
3

4

Answer 1

Question 2: 38.0 g/mol

Question 3: 62.31 g/mol

Question 4: 4 atoms