Periodic Table

Question 1

While developing his periodic table, Dmitri Mendeleev broke his own rule and placed the element tellurium before iodine in the group. He did this even though tellurium's atomic mass was known to be greater than iodine's. In his notes, Mendeleev stated that he expected tellurium to have a lower atomic mass than iodine. However, all measurements continue to show that tellurium has a greater atomic mass than iodine even though tellurium acts like it has a lower atomic mass.

Revolt · Accepted Answer

Mendeleev observed that tellurium has chemical properties like other elements in its group, and he did not know that neutrons cause the greater atomic mass.

Question 2

This is how fluorine appears in the periodic table.

Revolt · Accepted Answer

the atomic number

Question 3

Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid?

Revolt · Accepted Answer

Lavoisier and Mendeleev

Question 4

Based on the information in the table, which two elements are most likely in the same group, and why?

Revolt · Accepted Answer

bismuth and nitrogen, because they have the same number of valence electrons

Question 5

Based on the information in the table, which elements are most likely in the same periods of the periodic table?

Revolt · Accepted Answer

Boron and carbon are likely together in one period because they have very close atomic masses, while gallium and germanium are likely together in another period because they have very close atomic masses.

Question 6

This is how zirconium appears in the periodic table.

Revolt · Accepted Answer

40

Question 7

This is how krypton appears in the periodic table.

Revolt · Accepted Answer

36

Question 8

This is how osmium appears in the periodic table.

Revolt · Accepted Answer

114

Question 9

The element phosphorus is located to the right of the element magnesium along the same period in the periodic table.Which best describes the relationship of the elements?

Revolt · Accepted Answer

Phosphorus has a larger atomic mass.

Question 10

Part of one row of the periodic table is shown.

Revolt · Accepted Answer

tellurium (Te)

Periodic Table Answers

More from this Course

TRY EDGENUITY HACKS