Exam 1 FlashCards

Question 1

What is the purpose of scientific notation?

Answer 1

To represent very large or small numbers

Question 2

How do you convert large numbers to scientific notation?

Answer 2

Move the decimal (at the very end) to the front

To the left

Question 3

What is Avogradro’s number?

Answer 3

6.23x10^23

Question 4

How do you convert very small numbers to scientific notation?

Answer 4

Move the decimal to the right

Question 5

What are the seven base SI units?

Answer 5

Mass, Length, Time, Temperature, Electric Current, Light, Amount of Matter

Question 6

What does the Atomic Number represent and how do you find it>

Answer 6

It counts the amount of protons

Question 7

What was the original purpose of the atomic symbols?

Answer 7

To keep things mysterious, and mystical

Question 8

What does the mass number represent

Answer 8

The number of protons AND neutrons

Question 9

Define Isotopes

Answer 9

Atoms with the same number of protons, but different number of neutrons

Question 10

Define Anion

Answer 10

Net neg. charged atom due to an excess of electrons

Question 11

Define Cation

Answer 11

Net pos. charged atoms due to an deficiency of electrons

Question 12

Define Electromagnetic Radiation

Answer 12

The probe that was used to determine the arrangement of electrons around atoms

Question 13

What is another word for electromagnetic radiation

Answer 13

Light

Question 14

What is the symbol for wavelength

Question 15

What is the symbol for frequency

Answer 15

v

Question 16

What is the symbol for the speed of light?

Answer 16

c

Question 17

When frequency increases, what happens to the wavelength

Answer 17

it decreases

Question 18

When frequency decreases, what happens to the wavelength

Answer 18

it increases

Question 19

Define Frequency

Answer 19

The number of waves which pass in a second

Question 20

What is the constant for the speed of light (c)

Answer 20

3 x 10^8

Question 21

If the density increases, does light travel go faster or slower?

Answer 21

slower

Question 22

List the electromagnetic spectrum from lowest to highest frequency (or highest to lowest wavelength)

Answer 22

1) AM RADIO
2) TV / FM
3) Microwave
4) Radar
5) Infrared Light
6) Visible Light
7) Ultra Violet Light
8) X-ray
9) Gamma ray

Question 23

What is the visible light spectrum?

Answer 23

The very small portion of electromagnatic spectrum that we can see

Question 24

What does the ROYGBV order

Answer 24

The colors from long wavelength to short wavelength

Question 25

What is energy proportional to

Answer 25

Frequency

Question 26

Define Photon

Answer 26

The energy of light that travels through space in concentrated bundles

Question 27

what is the symbol for planck’s constant

Answer 27

h

Question 28

What is the number of planck’s constant

Answer 28

6.626 x 10^-34

Question 29

As frequency increases, what happens to energy

Answer 29

it increases

Question 30

As wavelength increases, what happens to energy

Answer 30

it decreases

Question 31

What is the Si unit for matter?

Answer 31

mole