Question

Write True or False. Correct the false statements.
1. A pure substance consists of a single type of particle.-

2. Some metals exit as gases.-

3. Sulphur is a metalloid.-

4. Compounds are substances made up of two or more elements.-

5. A molecule of hydrogen is made up of three atoms of hydrogen.-

Note:- If the sentence is false then don't forget to correct the statement.​

Answer 1

Answer:

1-yes

2-no

as liquid

3-yes

4-yes

5-no

made up of ( 2 ) atoms

Answer 2

Answer:

1.A pure substance is a homogeneous material that contains particles of only one kind and has a definite set of properties. Pure substances are further classified into elements and compounds. An element is a pure substance, which is made up of only one kind of atoms.

2.There are no such metals which exist in the gaseous state. All the metals exist in the solid state at normal temperature except mercury (Hg) which exist in the liquid state at normal temperature

3.Sulfur is present towards the right of the metalloids, therefore, it can be concluded that sulfur is a non-metal. It belongs to the oxygen family. All elements belonging to group 6A are collectively called chalcogens.

4.A compound is a substance that consists of two or more elements in a unique composition. The smallest particle of a compound is called a molecule. Chemical bonds hold together the atoms of molecules. Compounds can form only in chemical reactions, and they can break down only in other chemical reactions

5.