Chapter 1-EL2

Question 1

What is the absorption spectra?

Answer 1

When light is emitted by excited atoms and is black with coloured lines

Question 2

What is the emission spectra?

Answer 2

By remaining light after absorption by atoms and is colourful with black lines

Question 3

what is spectroscopy?

Answer 3

The study of how light and matter interact

Question 4

What is the wave theory of light?

Answer 4

Light has the same properties as a wave

Question 5

What is the equation for wave light theory?

Answer 5

C= λV

Question 6

What are the units for λ? And what does it mean?

Answer 6

wavelength=meters

Question 7

What are the units for C? And what does it mean?

Answer 7

Speed of light=3x10^8ms^-1

Question 8

What are the units for V? And what does it mean?

Answer 8

frequency=hertz

Question 9

What is particle theory of light?

Answer 9

Light is made up of particles

Question 10

What is the equation for particle theory of light? (2)

Answer 10

Er=hV
Er=hC / λ

Question 11

What are the units for h? And what is it?

Answer 11

plank constant=6.63x10^-34Js^-1

Question 12

What are the units for Er? And what does it mean?

Answer 12

Energy of a photon=joules

Question 13

What did Bohrs theory discover?

Answer 13

Explain why the hydrogen atom only emits a limited number of specific frequencies

Question 14

What is the lowest energy level called? (E1)

Answer 14

Ground level

Question 15

What is an excited state?

Answer 15

When an atom has an electron which receives enough energy to become promoted to a higher energy level

Question 16

What happens when an excited electron returns back to ground level?

Answer 16

It gives off light

Question 17

What happens when an excited electron returns back to ground level in a hydrogen atom?

Answer 17

It will give light off of different frequencies