Modern Atomic Theories

Question 1

What did Bohr use in his experiment and what did he discover?

Answer 1

A prism (a spectrometer) to discover the visible color spectrum

Question 2

What does white light produce

Answer 2

A continuous spectrum

Question 3

What does an excited atom produce?

Answer 3

A line emission spectrum, every color is produced from a different amount of energy
(Not all colors are present in an atom’s spectrum)

Question 4

Where can electrons be found? (Bohr’s conclusion)

Answer 4

Electrons can only be found in specific circular paths outside the atom called orbitals. They have fixed and definite energy levels

Question 5

What changes the further you move from the nucleus?
(Bohr’s conclusion)

Answer 5

The amount of energy depends on how far electrons are from the nucleus. The potential energy increases as you move outward

Question 6

What comparison did Bohr make?
(Bohr’s conclusion)

Answer 6

Energy levels are similar to the rungs of a ladder

Question 7

Where can an electron not be?
(Bohr’s conclusion)

Answer 7

An electron can’t exist between energy levels (You can’t stand between rungs on a ladder)

Question 8

What is required for an electron to move?
(Bohr’s conclusion)

Answer 8

A quantum energy is required to move an electron to the next highest level

Question 9

What happens when an electron absorbs enough energy?
(Bohr’s conclusion)

Answer 9

When electrons absorb enough energy and jump to an excited state, it’s called a quantum jump

Question 10

What happens when electrons return to ground state?
(Bohr’s conclusion)

Answer 10

When an excited electrons returns to the ground state, extra energy radiates in the form of photons

Question 11

Why are photons important?

Answer 11

They determine color depending on how much energy is given off

Question 12

How does a photon represent a line spectrum

Answer 12

Photons can only be one color at a time, so the spectrum cannot be continuous it has to be broken into parts

Question 13

What kind of spectrum does an element produce?

Answer 13

A distinctive lined spectrum that can be used to identify an element

Question 14

What is the flame test?

Answer 14

It’s a test for certain metal elements that produce a a emission spectrum that is visible to the human eye

Question 15

What does the color of the flame tell us?

Answer 15

It can reveal the metal ion that was burned

Question 16

What is the Modern Atomic Theory state?

Answer 16

The exact location of an electron is unknow, so we use orbitals, a 3D region to describe where an electron is. (There is a 90% rate of finding an electron in an orbital)