Is matter around as pure 1 short

Question 1

What is a concentration of a solution ?

Answer 1

The concentration of a solution is the amount
of solute present in a given amount of solution.

Question 2

What are the types of pure substance ?

Answer 2

Substances can be classified either as elements or compounds.

Question 3

Who first used the term element ?

Answer 3

Robert Boyle was the first scientist to use the
term element in 1661

Question 4

What are the forms of elements ?

Answer 4

Elements can be normally divided into metals, non-metals and metalloids.

Question 5

What are the properties of non-metals ?

Answer 5

• They display a variety of colors.
• They are poor conductors of heat and
electricity.
• They are not lustrous, sonorous or
malleable.
Examples of non-metals are hydrogen,
oxygen, iodine

Question 6

What is a compound ?

Answer 6

A compound is a substance composed of two or more elements, chemically combined with one another in a fixed proportion.

Question 7

What is a substance ?

Answer 7

A substance is a kind of matter that cannot be separated into other kinds of matter by any physical process

Question 8

What is a pure substance ?

Answer 8

Pure substances are substances that are made up of only one kind of particle

Question 9

What are metalloids and give examples ?

Answer 9

Some elements possess properties between those of metals and non-metals, they are called metalloids; examples are boron and silicon