Periodic table quiz

1. Which scientist arranged the elements in the early periodic table according to their atomic mass?

a) Henry Moseley
b) William Ramsay
c) Frederick Soddy
d) Dmitri Mendeleev

2. The discovery of which group of elements improved scientists understanding that electron arrangements were important in determining an elements reactivity?

a) Transition metals
b) Group 2 elements including magnesium and calcium
c) Group 7 elements including chlorine and bromine
d) Group 0 elements including neon and argon

3. What "nagging problem" did Mendeleev face with the elements iodine and telurium?

a) Their atomic numbers were not known
b) He had to swap their positions in his periodic table to fit their chemical properties
c) They reacted differently than expected
d) He could not find a place for them in his periodic table

4. In the modern periodic table the elements are arranged according to their number.

5. In the periodic table approximately percent of the elements are metals while approximately percent are non-metals.

6. What are the vertical columns in the periodic table called?

a) Groups
b) Periods
c) Shells
d) Rows

7. Why do elements in the same group of the periodic table have similar chemical properties?

a) They have the same number of electron shells
b) They have the same number of electrons in their outer shell
c) They have the same number of protons in their nucleus
d) They have the same number of neutrons in their nucleus

8. What does the horizontal row or period in the periodic table an element is found in tell you about the internal structure of the element?

a) The number of electrons in the outer shell
b) How reactive the element is
c) The number of electron shells present in the element
d) How stable the element is

9. The gases in group 0 of the periodic table are unreactive elements because they have full outer electron shells..

10. Why does tellerium have a higher average atomic mass than iodine despite iodine having a larger atomic number?

a) Tellurium has more protons
b) Tellurium has several isotopes with high atomic masses and high percentage abundances
c) Iodine has fewer electron shells
d) Tellurium has more electron shells