G8 T1

1-the atomic number of inert gas which is located in period 2 is ....

• 2

• 8

• 10

• 18

2- the valency of iodine is ....

• trivalent

• monovalent

• zero

• drivalent

3- the valency of argon is ....

• 1

• 0

• 8

• 6

4- the element which has the largest atomic radius in the same vertical group is the one with ...

• the least number of neutrons in its nucleus

• the least number of protons in its nucleus

• the least number of nucleons in its nucleus

• the largest number of electrons revolving around its nucleus

5- the alkali earth metals are located in the .... of the periodic table

• left

• right

• bottom

• middle

6- argon and helium are both active gases....

• TRUE

• FALSE

7- the chlorine is a gaseous element with a boiling point 25 c....

• TRUE

• FALSE

8-the valency of an element in group 4A equals the group number .....

• TRUE

• FALSE

9- the d-block contains most type of elements .....

• TRUE

• FALSE

10- the number of elements known so far is 118....

• TRUE

• FALSE