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Flashcards in M3.1 Deck (18):
1

what are the four effects of electricity?

-heat
-magnetic action
-light
-chemical action

2

How are the atoms arranged in metals?

Closed packed with a crystal lattice

3

Why do metals have a good conductivity?

High mobility of its electrons

4

How many electrons are on the outer shell of a good conductor?

Less than four

5

How many electrons are in the outer shell of a semi conductor?

Exactly four

6

What is doping?

Adding other foreign atoms by heat or light?

7

How many electrons are in the outer shell of an insulator?

More than four

8

How is matter broken down into atoms?

By use of chemicals

9

What charge are:
-protons
-electrons
-neutrons

-protons = positive
-electrons = negative
-neutrons = neutral

10

What is electric current?

The flow of electrons

11

What is a atoms charge if there is more protons than electrons?

Positively charged

12

What voltage is needed to remove electrons from an insulator?

More than 3 volts

13

What voltage is needed to remove electrons from a semi conductor?

Less than 3 volts

14

What voltage is needed to remove electrons from a conductor?

No voltage required

15

Are the number of protons in the nucleus the same as the number of electrons?

Yes

16

How is an atom ionised?

By being charged

17

What is a single charge of a electron?

0.1602x10(-18) Columbus

18

How much mass does a electron have?

Practically no mass