(a) electromagnetic radiation and atomic spectra

Question 1

What is wavelength?

Answer 1

The distance between adjacent crests (or high points) in a wave.

Question 2

How is wavelength usually measured?

Answer 2

In metres.

Question 3

What unit is wavelength preferred to be calculated in by chemists?

Answer 3

Nanometres

Question 4

How is metres converted into nanometers?

Answer 4

By multiplying by 10 to the power -9.

Question 5

What is the symbol for wavelength?

Answer 5

Lambda.

Question 6

What is frequency?

Answer 6

The number of wavelengths that pass a fixed point in one second.

Question 7

What is the symbol for frequency?

Answer 7

f.

Question 8

How is frequency measured?

Answer 8

1/time

Question 9

What unit is frequency measured in?

Answer 9

S^-1

Question 10

What is the unit also known as when related to frequency?

Answer 10

Hertz

Question 11

On the electromagnetic spectrum radiation with a short wavelength will have what type of frequency?

Answer 11

High.

Question 12

What does a long wavelength mean for the frequency?

Answer 12

It will be low.

Question 13

What do all types of electromagnetic radiation travel at?

Answer 13

The same velocity in a vacuum.

Question 14

What is the velocity which all electromagnetic radiation travel at?

Answer 14

3.00x10^8 ms-1

Question 15

What symbol is velocity denoted by?

Answer 15

c

Question 16

What is the relationship between frequency, velocity, and wavelength?

Answer 16

f=c/lambda or c=f x lambda or lambda=c/f

Question 17

What type of nature does electromagnetic radiation have?

Answer 17

Duel nature.

Question 18

What are the 2 natures of electromagnetic radiation?

Answer 18

Wave motion and streams of photons.

Question 19

What happens to the electrons in a substance when it absorbs or emits a photon?

Answer 19

It will gain or loose energy.

Question 20

If photons have (high energy radiation) (short wavelength) what does this mean for their energy?

Answer 20

It is high.

Question 21

What is the energy carried by a photon related to?

Answer 21

Its frequency.

Question 22

What is energy denoted by?

Answer 22

E

Question 23

What does E equal?

Answer 23

E=hf

Question 24

What is h?

Answer 24

Plancks constant.

Question 25

What number is planks constant?

Answer 25

6.63x10^-34 J

Question 26

What is energy measured in?

Answer 26

Joules.

Question 27

What measurement is more useful for energy when in chemistry? (energy)

Answer 27

Kilojoules.

Question 28

What does L equal? (look at deck)

Answer 28

Arogandros constant.

Question 29

What is arogandros constant used for?

Answer 29

Used to determine the number of atoms per mole.

Question 30

What number is arogandros constant?

Answer 30

6.02x10^23

Question 31

What equation is used to determine the energy per mole of photons?

Answer 31

E=hLf/

1000