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Flashcards in Chemistry Deck (84)
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1

How are elements arranged in the periodic table?

Increasing atomic number

2

What group are the alkali metals?

1

3

What group are the alkaline earth metals?

2

4

What group are the halogens?

17

5

What group are the noble gases?

18

6

As you go down a metal group, what happens to reactivity?

It increaes

7

As you go down a non-metal group, what happens to reactivity?

Decreases

8

How are new substances formed in a chemical reaction?

Atoms and electrons are rearranged

9

What are the three factors that affect the position of an equilibrium?

Concentration, temperature, pressure

10

What can Avogadro's number be used to calculate?

The number of particles in one mole of a substance

11

How do you calculate concentration?

Either mass or moles divided by volume

12

How to calculate percentage yield

(Actual yield/predicted yield) x 100

13

How do you calculate solubility?

Divide the mass of the solute by the mass of the solvent and multiply by 100

14

What is a saturated solution?

A solution where no more solute can be dissolved in the solvent

15

What are physical processes used for?

Separating mixtures

16

What are chemical processes used for?

Displacing elements from compounds`

17

What are miscible liquids?

A 'mixable' liquid

18

How to tell if a substance is pure using chromatography

There will only be one line produced

19

What type of reaction is the neutralization of a base and an acid?

Exothermic

20

What will be produced when the oxides of most non-metals react with water?

An acidic solution

21

What type of reaction is bond breaking?

Endothermic

22

What type of reaction is bond making?

Exothermic

23

What is an electrode?

A conductor through which electricity can travel

24

What is a cathode?

The negative electrode

25

What is an anode?

The positive electrode

26

What kind of current is used in electrolysis?

Direct

27

Why can't alternating current be used in electrolysis?

The cathode and anode would be constantly changing

28

What happens at the cathode?

The cations are reduced

29

What happens at the anode?

The anions are oxidized

30

How is electrolysis used in electroplating?

Electricity flows through the electrolyte, separating it
These atoms form a thin layer on top of the electrodes