Chapter 5: Electrons in Atoms

Question 1

1911 Rutherford’s atomic model could not explain the chemical properties of elements

Answer 1

Q

Question 2

1913 Bohr proposed than an electron is found only in specific circular paths, or orbits, around the nucleus

Answer 2

Q

Question 3

Energy levels

Answer 3

Fixed energies and electron can have

Question 4

Quantum

Answer 4

Amount of energy required to move an electron from one energy level to another

Question 5

Quantum mechanical model

Answer 5

Modern description of the electrons in atoms; 1926 Schrodinger

Question 6

Atomic orbital

Answer 6

Region of space in which there is a high probability of finding an eletron

Question 7

Aufbau principle

Answer 7

Electrons occupy the orbitals of lowest energy first; think of how you start filling in an aufbau diagram

Question 8

Pauli exclusion principle

Answer 8

Atomic orbital may contain at most two electrons

Question 9

Hund’s rule

Answer 9

Electrons occupy both orbitals of the same energy in a way that makes the number of electrons with the same spin direction as large as possible

Question 10

Amplitude

Answer 10

Wave’s height from zero to the crest

Question 11

Wavelength

Answer 11

Half-Life symbol, Greek letter lambda; Distance between the crests

Question 12

Frequency

Answer 12

Slanted v, Greek letter nu;l Number of wave cycles to pass a given point per unit of time

Question 13

Hertz (Hz)

Answer 13

SI unit of cycles per second (frequency is measured in hertz)

Question 14

C = (Wavelength) (Frequency)

Answer 14

Constant (speed of light) equals the wavelength times the frequency

Question 15

Electromagnetic radiation

Answer 15

Radio waves, microwaves, infrared waves, visible light, ultraviolent waves, X-rays, and gamma rays

Question 16

2.998 x 10 to the 8 m/s

Answer 16

Speed of electromagnetic waves