Atomic Structure Review

History of the Atom

100

The philosopher who was among the first to suggest the exsistance of the atom

Who is Democritus

200

The early atomic model had 4 parts 

1. All elements are made of atoms

2. Atoms of the same element are identical, yet different from those of another element.

3. Atoms of different elements can be physically mixed together or chemically combined in simple whole numbers.

AND

What are chemical reactions that occur when atoms are separated, joined, or rearranged. 

300

The cathode ray experiment helped discover what part of the atom

What is the electron. 

400

The experiment that determined that the atom is mostly empty space with a highly positive center. 

What is the gold-foil experiment.

500

The differences in Thomson's model and Rutherfords model are. 

What are that the Thomson thought the positive matter took up with space of an atom, with negative particles (like a blueberry muffin). Verse Rutherford gave his model a center postive nucleus with electrons orbiting. 

PEN

100

^{How many neutrons} 

6

200

How many electrons 

10

300

The element with the symbol Cu.

What is copper

400

The total protons, electrons, and neutrons. 

What is 20, 18, 21

500

The spelling of Cudahy using the periodic table.  Make sure when spelling you are using the options with the least amount of Mass. 

What is 

Carbon

Uranium

Dubnium

Aluminum 

Hydrogen 

Ytterbium

Bohr Models

100

Draw the bohr model for Sulfur.

  

200

Draw the bohr model for Neon

  

300

Draw the bohr model for Bromine. 

   

400

Draw the bohr model for Lithium

 

500

Draw the bohr model for Rubidium

   

Percent Comp

100

Find the percent of Carbon in CH₄

75%

200

Find the percent comp of oxygen in CO_2. 

72.72%

300

How many atoms of Hydrogen are in H₂O if the percent composition is of hydrogen is 11.11%

2

400

What is the percent composition of nitrogen in (NH₄)₃P. 

49.4%

500

If the percent of O is 94% is the substance water (H₂O) or hydrogen peroxide (H₂O₂)?

H₂O₂

Average Atomic Mass

100

Rubidium is a soft, silvery-white metal that has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium?

85.556 amu

200

Find the average atomic mass for Cl if 75.78% of Cl atoms are 35Cl with a mass of 34.96885271 amu and 24.22% are 37Cl with a mass of 36.96590260 amu.

35.453 amu

300

Find the average atomic mass for B if 19.9% of B atoms are 10B with a mass of 10.0129371 amu and 80.1% are 11B with a mass of 11.0093055 amu.

10.811 amu

400

The one way we can check our work when calculation average atomic 

What is using the periodic table.

500

Uranium is used in nuclear reactors and is a rare element on earth. Uranium has three common isotopes. If the abundance of 234U is 0.01%, the abundance of 235U is 0.71%, and the abundance of 238U is 99.28%, what is the average atomic mass of uranium?

237.98 amu