1. Hydrogen matches the properties of the first group and seventh group of the periodic table.

2. Following is some additional information about the properties of hydrogen.

- Hydrogen is a highly flammable gas.

-Hydrogen is a major component of water.

- Hydrogen can be used as fuel.

Hydrogen is used in the chemical industry to make many types of products.

1. In 1845, the German chemist who published a method for the synthesis of 'acetic acid', a natural product containing two carbon atoms, was Hermann Kolbe.

2. He created carbon disulfide with chlorine, and the end result was carbon tetrachloride.

1. Name: Antagonist

2. Mechanism of action: By binding to the surface of the receptor, they cause opposition to the natural function.