Chapter 7-9 Terms And Equations

Question 1

Wavelength

Question 2

Frequency

Question 3

Constructive interference

Answer 3

Waves in phase combine

Question 4

Destructive interference

Answer 4

Waves out of phase and cancel one another

Question 5

Diffraction

Answer 5

Bending a wave around the edge of an opening or obstacle

Question 6

Black body radiation

Answer 6

Emisión of light from hot objects (high in energy)

Question 7

Photoelectric effect

Answer 7

Emission of e’s from metal surfaces causes the surfaces to emit electrons , makes objects shine light from reflection

Question 8

Emission spectra

Answer 8

Emission of light range of wavelengths from a atom stimulated by heat or electric current

Question 9

Light has both wavelike and particle like characteristics , true or false?

Answer 9

True

Question 10

Valence electrons

Answer 10

The electrons in the sub shells with the highest energy

Question 11

Formula for effective nuclear charge

Answer 11

Zeff = Z-S
Z= atomic number
S= # of shielding E-‘s

Question 12

What is the periodic trend for the size of atoms and ions?

Answer 12

Increases from top to bottom
And decreases from the left to right

Question 13

How to find the shielding electrons?

Answer 13

Core electrons - valence electrons
Ex. Sulfur
10 core electrons - 6 valence electrons