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Flashcards in Unit 1 Deck (40)
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1

What is the mass number equal to?

Protons + neutrons

2

What are the neutrons equal to?

Mass - atomic OR mass - protons

3

What is an isotope?

Atoms with the same number of protons but a different number of neutrons

4

How do you calculate the average rate of reaction?

Change in volume / change in time

5

Give examples of how a reaction can be made faster

Bigger surface area, higher temperature, higher concentration, catalyst

6

On a reaction rate graph what indicates a faster reaction rate?

Steeper slope

7

Covalent molecular bonding is between what?

Non-metals

8

Covalent network bonding is between what?

Non-metals (B,C,Si)

9

Ionic bonding is between what?

Metal + non-metal

10

Metallic bonding is between what?

Metals

11

In a covalent molecular, what forces hold the molecules together?

Weak Van der Waals forces

12

Covalent molecular share what to form full outer shells?

Unpaired outer electrons

13

In a covalent molecular what holds the atoms together?

Attraction of two positive nuclei

14

Do covalent molecular conduct?

No

15

Do CM dissolve in water?

No

16

Do CM have a high or low melting/boiling point?

Low

17

Do CN conduct?

No

18

Do CN dissolve in water?

No

19

Do CN have a high or low melting/boiling point?

High

20

Do IL conduct?

Yes in molten or solution

21

Do IL dissolve in water?

Yes

22

Do IL have a high or low melting/boiling point?

High

23

How do you calculate relative atomic mass?

Total mass of 100 atoms/ 100 (See ring binder for example)

24

How does an acid form?

Non-metal oxide + water -> acid

25

How does an alkali form?

Metal oxide + water -> alkali

26

What is electrolysis?

When current/electricity is passed through a solution and breaks it up (ions are free to move)

27

Why do substances conduct electricity?

The ions are free to move

28

What is neutralisation?

When the H+ ions of an acid or the OH- ions of an alkali are removed to give a solution with a pH of 7

29

Acid + alkali -> ?

Salt + water

30

Acid + metal oxide -> ?

Salt + water