Chemistry revision (atoms,elements compounds and mixtures)

Question 1

What is an element?

Answer 1

an element is a group of one kind of atom

Question 2

what is 3 examples of an element?

Answer 2

oxygen (O2) Nitrogen (N2) and Hydrogen (H2)

Question 3

What is a compound? what is an example of a compound?

Answer 3

A compound is two or more different elements chemically bonded together.
An example of a compound is sodium chloride

Question 4

What is a mixture ? what is an example of a mixture

Answer 4

A mixture is two or more different elements or compounds that aren’t chemically bonded together.
An example of a mixture is sand water

Question 5

What is an atom?

Answer 5

Atoms make up everything and they are made of protons ,neutrons and electrons

Question 6

What is filtration?

Answer 6

Filtration is a process used to separate mixtures, specifically and insoluble solid from a liquid e.g sand water mixture

Question 7

What is a solute?

Answer 7

A solute is something that has dissolved in a solvent e.g salt,sugar…

Question 8

What is a solvent?

Answer 8

A solvent is a liquid that can dissolve other substances

Question 9

What is a solution?

Answer 9

A solution is a liquid mixture of two or more substances and it consists of a solute and a solvent

Question 10

What are the three stages of distillation?

Answer 10

1)Evaporation
2)Condensation
3Collection

Question 11

What is chromatography?

Answer 11

Chromatography separates mixtures of coloured/non-coloured substances that are soluble in the same solvent