Question

Discuss three characteristics in which hydrogen resembles alkali metals.

Answer 1

Alkali metals are Li, K, Na, Rb, Cs, and Fr where these are “first group” of the “periodic table”.

The following properties will show Hydrogen resembles alkali metals

1. “Electronic configuration”:  

The “alkali metals” and “hydrogen” have one electron in their outmost shell.

Example:

$Hydrogen:\quad 1\quad \rightarrow \quad 1{ s }^{ 1 }\\ Sodium:\quad 11\quad \rightarrow \quad { 1s }^{ 2 }{ 2s }^{ 2 }{ 2p }^{ 6 }{ 3s }^{ 1 }$

2. “Electropositive character”:

Hydrogen and alkali metals readily lose their one electron and forms positive ions. Both these are elements exhibit electropositive character

$H\quad \rightarrow \quad { H }^{ + }+\quad { e }^{ - }\\ Na\quad \rightarrow \quad N{ a }^{ + }\quad +\quad { e }^{ - }$

3. “Oxidation state”: Hydrogen and alkali metals exhibit +1 oxidation state.

4. “Combination with non-metals”: Alkali metals and hydrogen are reacts with non-metals like oxygen, sulphur and halides to form respective oxides, halides, and sulphides.

5. “Liberation at the cathode”: Both Alkali metals and hydrogen are liberated at cathode during the process of electrolysis.

6. “Reducing character”: Both “Alkali metals” and “hydrogen” act as agent of reduction.

Answer 2

Alkali metals are Li, K, Na, Rb, Cs, and Fr where these are “first group” of the “periodic table”.

The following properties will show Hydrogen resembles alkali metals

1. “Electronic configuration”:  

The “alkali metals” and “hydrogen” have one electron in their outmost shell.


2. “Electropositive character”:

Hydrogen and alkali metals readily lose their one electron and forms positive ions. Both these are elements exhibit electropositive character}

3. “Oxidation state”: Hydrogen and alkali metals exhibit +1 oxidation state.

4. “Combination with non-metals”: Alkali metals and hydrogen are reacts with non-metals like oxygen, sulphur and halides to form respective oxides, halides, and sulphides.

5. “Liberation at the cathode”: Both Alkali metals and hydrogen are liberated at cathode during the process of electrolysis.

6. “Reducing character”: Both “Alkali metals” and “hydrogen” act as agent of reduction.