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Flashcards in Introduction Deck (15)
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1

What are the four separation techniques?

Filtering, evaporation, distillation and chromatography

2

What is a synthesis reaction?

When a compound is made from simple reactants. E.g. Magnesium + oxygen -> magnesium oxide

3

What is a decomposition reaction?

When a compound breaks down into two or more products, e.g. Copper carbonate -> copper oxide +carbon dioxide

4

What is an element?

Contains one type of atom containing the same amount of protons

5

What is a compound?

Combination of two or more different elements in a FIXED proportion, joined by strong bond

6

What is a molecule?

What is created when two or more non metals chemically bond

7

What is a mixture?

When and elements and compounds are mixed together but aren't chemically bonded

8

How can mixtures be separated?

Physical means like heat and magnets

9

List three ways to decompose a compound?

Electricity, heat and light

10

How are the components in a mixture fixed?

They aren't

11

What does decomposition generally require?

A source of energy, for example electrolysis or thermal decomposition.

12

Wha does corrosive mean?

These materials can give you blisters

13

What does harmful mean?

These materials can kill living cells.

14

What does toxic mean?

These materials can kill you.

15

What does irritant mean?

These materials can make your skin itchy.