Chap 3: Chemical Composition of Matter

Question 1

Define element

Answer 1

It is the basic building blocks of matter and cannot be broken down into simpler substances

Question 2

Define compounds

Answer 2

It is made of two or more elements that are chemically combined
Does not have similar properties as its constituent elements
Chemically combined by fixed proportions of mass

Question 3

Define mixtures

Answer 3

Made up of two or more elements or compounds that are not chemically combined
It has the same properties as its constituent elements, do not have fixed proportions and can be separated easily

Question 4

What are solutions?

Answer 4

It is a mixture in which one substance completely dissolves in another substance

Solute=Dissolves in solvent
Solvent=Substance solute dissolves in

Question 5

What are suspentions?

Answer 5

It is a mixture that contains insoluble particles in the solvent

Question 6

What’s the difference with Solutions and suspentions?

Answer 6

Solution:
1. Solute particles cannot be seen
2. Light passes through fully
3. Solute does not settle to bottom
Suspention:
1. Light cannot pass through fully
2. Insoluble solute settles to the bottom
3. Solute particles visible