Answer
a. C period 2, group IVA, non metal
b. Po period 6,group VIA, metal
c. Cr period 4, group VIB, metal
d. Mg period 3, group II A, metal
e. B period 2, group III A, metalloid
Work Step by Step
Strategy to work in Period table of the elements:
periods numbers are given in the far left of the table (horizontal rows of the table)
Group numbers are given in the top of the table (vertical rows of the table)
The "staircase" that starts at group III A and ends at VII A, divides metals from nonmetals. The elements on the left are metals, those on the right are non metals, while the elements next to the "staircase" are metalloid.
Applying these rules we found that:
a. C is on period 2, group IVA, and it is non metal as it is on the right of the "staircase"
b. Po is on period 6,group VIA, metal as it is on the leftof the "staircase"
c. Cr is on period 4, group VIB, metal
d. Mg is on period 3, group II A, metal
e. B is period 2, group III A, metalloid
