Question

1.To which period and group does an elemer

with atomic number 11 belong!
A Period 1 and group IN A
B.Period 3 and group IA
C.Period 3 and groupA
D.Period 5 and group A
E. Period 6 and group IIA
Please be fast!!!​

Answer 1

Period 3 and group IA
Because the periods are the vertical columns and the groups are the horizontal ones. The element with the atomic number 11 is sodium.

Answer 2

The element discussed here belongs to the period 1A.So,the element A,which has its atomic number as 11 belongs to group 1(1A) on the periodic Table.

Step-by-step explanation:

Group and periods are two ways of categorizing element in the periodic table.Periods are horizontal rows (across) the periodic table,while groups are vertical columns (down) the table.Atomic number increases as you move down a group of across the periods.