chapter 6: study guide

Question 1

what are valence electrons?

Answer 1

• are involved in chemical bonding
• they are the outer-shell electrons listed after the core

Question 2

what are core electrons?

Answer 2

are inner-shell electrons that have the electron configuration of the nearest noble-gas element

Question 3

what does each box in an orbital diagram represent?

Answer 3

each box represents an orbital

Question 4

what object is represented by the half arrows in an orbital diagram? what does the direction of the arrow signify?

Answer 4

• half arrows represent electrons
• the direction of the arrows represent electron spin

Question 5

true or false: visible light is a form of electromagnetic radiation

Answer 5

true

Question 6

true or false: ultraviolet light has longer wavelengths than visible light

Answer 6

false

Question 7

true or false: x rays travel faster than microwaves

Answer 7

false (travel at same speed)

Question 8

true or false: electromagnetic radiation and sound waves travel at the same speed

Answer 8

false

Question 9

does the hydrogen atom expand or contract when an electron is excited from the n=1 state to the n=3 state?

Answer 9

expands

Question 10

what is the relationship between wavelength and frequency?

Answer 10

the longer the wavelength, the smaller the frequency

Question 11

is energy emitted or absorbed: n=4 to n=2

Answer 11

energy is emitted

Question 12

is energy emitted or absorbed: 2.12 A to one of radius 8.46 A?

Answer 12

energy is absorbed

Question 13

arrange the following in increasing wavelength?

Answer 13

• x rays
• ultraviolet
• green light
• red light
• infrared
• radio waves