Unit 2 4:3 Modern Atomic Theory

Question 1

Who developed the modern atomic model

Answer 1

Bohr

Question 2

Explain the modern atomic model (Bohr)

Answer 2

• electrons can be found only in certain everyday levels, not between levels
• the location of electrons cannot be predicted precisely, limited to energy levels
-they gain energy to move to a higher energy level or lose energy to move to a lower energy level

Electrons act like waves, cannot be determined

Question 3

Valence electron

Answer 3

An electron that is found in the outermost she’ll of an atom and that determines the atoms chemical properties

Question 4

Orbital types

Answer 4

S, p, d, f

Question 5

How many electrons can 1 orbital hold

Answer 5

2 electrons

Question 6

What do orbital determine?

Answer 6

The number of electrons that each level can hold

Question 7

How are the energy levels of an atom filled

Answer 7

The number of energy levels that are filled in an atom depends on the number of electrons.

Question 8

What makes an electron jump to a new energy level?

Answer 8

Electrons jump between energy levels when an atom grain or loses energy

Question 9

Ground state

Answer 9

The lowest state of energy of an electron

Question 10

Excited state

Answer 10

What an electron moves to when it gains energy by absorbing a photon

Question 11

Photon

Answer 11

An unit or quantum of light

Question 12

How/when does an electron release a photon?

Answer 12

When it falls back to a lower level

Question 13

The different energy of a photon corresponds w/

Answer 13

To the size of the electron jump

Question 14

Wavelength

Answer 14

Atoms absorb or emit light at certain wavelengths

• each element has a unique atomic structure, the wavelengths emitted depend on the particular element
• are a type of “atomic fingerprint” that can be used to identify the substance

Question 15

Orbital

Answer 15

A region in an atom where there is a high probability of finding electrons