(i) Hydrogen differs from alkali metals in the following ways:

1. Hydrogen has only one electron in its outermost shell, while alkali metals have one electron in their outermost shell but also have additional inner shells of electrons.

2. Hydrogen exists as a diatomic molecule (H2) in its natural state, while alkali metals exist as individual atoms.

3. Hydrogen is a gas at room temperature, while alkali metals are solid.

4. Hydrogen does not possess metallic characteristics like alkali metals. For example, it is not a good conductor of electricity and heat.

(ii) Hydrogen differs from halogens in the following ways:

1. Hydrogen has only one electron in its outermost shell, while halogens have seven electrons in their outermost shell.

2. Hydrogen is a nonmetal, while halogens are nonmetals but they are more reactive than hydrogen.

3. Hydrogen exists as a diatomic molecule (H2) in its natural state, while halogens exist as diatomic molecules (F2, Cl2, Br2, I2) in their natural state.

4. Hydrogen forms positive ions (H+) by losing one electron, while halogens form negative ions (F-, Cl-, Br-, I-) by gaining one electron.

Question

(i) Hydrogen differs from alkali metals in the following ways:

1. Hydrogen has only one electron in its outermost shell, while alkali metals have one electron in their outermost shell but also have additional inner shells of electrons.

2. Hydrogen exists as a diatomic molecule (H2) in its natural state, while alkali metals exist as individual atoms.

3. Hydrogen is a gas at room temperature, while alkali metals are solid.

4. Hydrogen does not possess metallic characteristics like alkali metals. For example, it is not a good conductor of electricity and heat.

(ii) Hydrogen differs from halogens in the following ways:

1. Hydrogen has only one electron in its outermost shell, while halogens have seven electrons in their outermost shell.

2. Hydrogen is a nonmetal, while halogens are nonmetals but they are more reactive than hydrogen.

3. Hydrogen exists as a diatomic molecule (H2) in its natural state, while halogens exist as diatomic molecules (F2, Cl2, Br2, I2) in their natural state.

4. Hydrogen forms positive ions (H+) by losing one electron, while halogens form negative ions (F-, Cl-, Br-, I-) by gaining one electron.

Knowee AI · Accepted Answer

(i) Hydrogen differs from alkali metals in the following ways:

1. Hydrogen has only one electron in its outermost shell, while alkali metals have one electron in their outermost shell but also have additional inner shells of electrons.

2. Hydrogen exists as a diatomic molecule (H2) in its natural state, while alkali metals exist as individual atoms.

3. Hydrogen is a gas at room temperature, while alkali metals are solid.

4. Hydrogen does not possess metallic characteristics like alkali metals. For example, it is not a good conductor of electricity and heat.

(ii) Hydrogen differs from halogens in the following ways:

1. Hydrogen has only one electron in its outermost shell, while halogens have seven electrons in their outermost shell.

2. Hydrogen is a nonmetal, while halogens are nonmetals but they are more reactive than hydrogen.

3. Hydrogen exists as a diatomic molecule (H2) in its natural state, while halogens exist as diatomic molecules (F2, Cl2, Br2, I2) in their natural state.

4. Hydrogen forms positive ions (H+) by losing one electron, while halogens form negative ions (F-, Cl-, Br-, I-) by gaining one electron.

n what respect does hydrogen differ from(i) Alkali metals(ii) Halogens

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