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Chemistry for beauty > Definitions > Flashcards

Flashcards in Definitions Deck (16)
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1
Q

Describe a solid

A

It retains it’s shape, does not flow and the molecules are flocked in place

2
Q

Describe a liquid

A

Takes the shape of its container, it flows and the molecules are less tightly packed, not easily compressible

3
Q

Describe a gas

A

Fills the shape or volume of the container holding it, lots of space between the molecules and easily compressed

4
Q

What is a molecule ?

A

Two or more atoms joined together forming either a covalent or ionic bond.

5
Q

What is melting point ?

A

The point at which a solid turns into a liquid

6
Q

What is boiling point ?

A

The point at which a liquid turns into a gas

7
Q

What is odour ?

A

Gas moving through the air to the nose which triggers a sense of smell

8
Q

What is heat conductivity ?

A

The ability of a substance to transmit heat

9
Q

What is electrical conductivity ?

A

The ability of a substance to conduct electricity

10
Q

what is brittleness ?

A

a substance that breaks easily.

11
Q

What is density

A

a measure of the mass of a substance to its volume

12
Q

what is viscosity ?

A

The measure of the resistance of a fluid to changing its shape. Less viscous liquids move easily.

13
Q

what is temperature

A

The measure of the heat or coldness of a substance usually measured in degrees Celsius.

14
Q

What is oxidisation ?

A

A chemical combination of a substance with oxygen - usually involves the atom or ion losing elctrons

15
Q

Describe hard water

A

Contains calcium and magnesium ions. Hardness is based on the amount of calcium carbonate in the water and prevents soup lathering.

16
Q

Describe soft water

A

Soft water has no or minimal minerals and soap lathers easily.