Question

Name the following: 13

1) The most reactive non-metal.*

2) The atom having the smallest atomic mass.*

3) Two elements having valency 4.*

4) The family of metals having valency two.*

5) Nonmetals in the third period.*

6) The noble gas with the smallest atomic radius.*

7) The atom having the smallest size.*

8) The family of metals having valency one.*

9) The group with valency zero.*

10) The period with electrons in the shells K, L and M.*

11) The most electronegative atom.*

12) The metalloids in the second and third periods.*

13) The family of nonmetals having valency one.*​

Answer 1

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❶) The most reactive non-metal. - Fluorine

❷) The atom having the smallest atomic mass. - Hydrogen

❸) Two elements having valency 4. - Carbon and Silicon

❹) The family of metals having valency two. - Alkaline earth metals

❺) Non metals in the third period. - Phosphorous, Sulphur, Chlorine, Argon

❻) The noble gas with the smallest atomic radius. - Helium

❼) The atom having the smallest size. - Helium

❽) The family of metals having valency one. -Alkali Metals

❾) The group with valency zero. - Noble gases

❿) The period with electrons in the shells K, L and M. - Third Period

⓫) The most electronegative atom. - Fluorine

⓬) The metalloids in the second and third periods. - Boron and Silicon

⓭) The family of nonmetals having valency one. - Halogen family

Answer 2

Answer:

$\mapsto$ $\bigstar \: \boxed{\sf{Name\: the\: Following\: :-}}$

1) The most reactive non-metals :-

$\implies$ Fluorine (F).

2) The atom having the smallest atomic mass :

$\implies$ Hydrogen (H)

3) Two elements having valency 4 :

$\implies$ Silicon and Carbon.

4) The family of metals having valency two :

$\implies$ Alkaline earth metals.

5) Non-metals in the 3rd period :

$\implies$ Argon (Ag), Chlorine (Cl), Sulphur (S) and Phosphorus (P).

6) The noble gas with smallest atomic radius :

$\implies$ Helium (He).

7) The atom having the smallest size :

$\implies$ Helium (He).

8) The family of metals having valency one :

$\implies$ Alkali metals.

9) The group with valency zero :

$\implies$ Noble Gas.

10) The period with electrons in the shells K,L and M :

$\implies$ 3rd Period.

11) The most electronegative atom :

$\implies$ Fluorine, Oxygen and Nitrogen.

12) The metalloids in the second and third period :

$\implies$ Boron (B) and Silicon (Si).

13) The family of non-metals having valency one :

$\implies$ Halogen Family.

Extra Information:-

• Sodium is an element of 3rd period.
• Calcium is alkaline earth element.
• In modern periodic table, Lanthanides are placed in 6th period.
• The example of rare earth element is cerium.
• Chalcogens in the periodic table belongs to group 16.
• Mendeleev's periodic table is based on atomic weight.