Average Atomic Mass
All About an Atom
Speed of Light
Bohr Models
100

Average atomic mass is a _________ average

Weighted
100

What is the atomic number?

Number of protons in the nucleus

100

What is c?

Speed of light constant


3.00 * 108 m/s

100

How many electrons go in the first energy level?

2

200

The element copper has naturally occurring isotopes with mass numbers of 63 and 65.  The relative abundance and atomic masses are listed below.  Calculate the average atomic mass of copper.

 

69.2% for mass of 62.93 amu

30.8% for a mass of 64.93 amu

63.5 amu

200
What is atomic mass? 

Number of protons and neutrons in the nucleus of an atom

200

Violet light has a wavelength of 4.10 x 10-12 m. What is the frequency?

7.13 * 1019  Hz

200

How many electrons can go in the second energy level?

8

300

Calculate the average atomic mass of sulfur if 95.00% of all sulfur atoms have a mass of 31.972 amu, 0.76% has a mass of 32.971 amu and 4.22% have a mass of 33.967 amu.

 

32 amu

300

Define an isotope

Same number of protons, different number of neutrons 
300

What is the wavelength (in meters) of the electromagnetic carrier wave transmitted by The Sports Fan radio station at a frequency of 640. Hz?

4.69 * 105 m

300

Draw the Bohr model of sulfur-32!


400

 Naturally occurring strontium consists of four isotopes, Sr-84, Sr-86, Sr-87 and Sr-88.  Below is the data concerning strontium.  What is the average atomic mass of strontium?

 

Sr-84         Sr-86         Sr-87        Sr-88

0.56%         9.86%         7.00%         82.58%

88 amu

400

Define an ion

Same number of protons, different number of electrons

400

A helium laser emits light with a wavelength of 633 nm. What is the frequency of the light?  (1nm = 1.0 × 10-9 m)

 

4.73 * 1014 Hz

400

If an atom is 2 electrons away from completing the second energy level, what will it do to satisfy the octet rule? What will its charge be?

It will gain 2 electrons (charge of -2)

500

Calculate the average atomic mass of bromine. One isotope of bromine has an atomic mass of 78.92 amu and a relative abundance of 50.69%. The only other major isotope of bromine has an atomic mass of 80.92 amu.

79.90 amu

500

What is a cation vs anion?

Cation: Positively charged ion

Anion: Negatively charged ion

500

Green light has a frequency of 6.01 x 1014 Hz. What is the wavelength?

 4.99 * 10-7 m

500

If an atom only has one electron in the outermost energy level, how many electrons will it lose/gain to satisfy the octet rule?  What will its charge be?

Lose 1 electron (charge of +1)