Question

the periodic table is organized into periods and groups. periods - the horizontal rows on the periodic table. groups - the columns on the periodic table. elements in same group have the same number of valence electrons. instructions: use the periodic table to answer the questions be 1) how many periods are there on the periodic table? 2) how many groups are there on the periodic table? 3) which element is found in group 2 and period 3? 4) which element is found in group 17 and period 2? 5) which element is found in group 10 and period 4? 6) which element is found in group 18 and period 6? 7) which element is found in group 1 and period 7? 8) which element is found in group 14 and period 6?

Explanation:

Step1: Count periods

Periods are horizontal rows. Counting them on a standard periodic - table, we find 7.

Step2: Count groups

Groups are vertical columns. There are 18 groups on a standard periodic - table.

Step3: Locate element in Group 2 and Period 3

Looking at the periodic - table, the element in Group 2 and Period 3 is Magnesium (Mg).

Step4: Locate element in Group 17 and Period 2

The element in Group 17 and Period 2 is Fluorine (F).

Step5: Locate element in Group 10 and Period 4

The element in Group 10 and Period 4 is Nickel (Ni).

Step6: Locate element in Group 18 and Period 6

The element in Group 18 and Period 6 is Radon (Rn).

Step7: Locate element in Group 1 and Period 7

The element in Group 1 and Period 7 is Francium (Fr).

Step8: Locate element in Group 14 and Period 6

The element in Group 14 and Period 6 is Lead (Pb).

Answer:

1. 7
2. 18
3. Magnesium (Mg)
4. Fluorine (F)
5. Nickel (Ni)
6. Radon (Rn)
7. Francium (Fr)
8. Lead (Pb)