Beanium Lab

Beans after separated into color groups.

Beans before separated into color groups.

In trying to determine Isotopes of a "new" element, we counted the total number of beans, and the number of each color. We calculated the average mass of the isotopes by dividing the total mass by number of beans in that certain color. Also, calculated % abundance by dividing the number of beans in certain color by total of overall beans.

Influential Scientist

Dalton's 5 postulates Postulates

• elements composed of atoms
• atoms of one element are identical
• atoms of different elements are different
• compounds consist of the atoms of different elements
• atoms indivisible and are not created/destroyed in chemical reactions

how postulates are wrong

JJ Thompson(chocolate chip) JJ Thompson animation/information

• used cathode tube to show the atoms of any element emit particles with -charge



julieanngaleo.wikispaces.com

• electrons placed randomly in positive matrix

chemistry.tutorcircle.com

Rutherford(gold foil) Gold foil animation

• proved positively charged center in atom
• area of + was small and dense when compared to whole atom

www.daviddarling.info

Current Model

Atomic Structure and Radioactivity pre-test

This pre-test was very difficult for me, in reality I guessed on all of the questions. I did not know how to find the rate of atomic decay or half-life. I remembered very little about the difference between fission and fusion from physical science freshman year. I hope to master the sections from this unit, and with some instruction I believe I will be able to.

How to guess successfully

Types of Binary Compound Naming

tips for naming

Type 1

Characteristics

• contain metal and non-metal
• cation(+) and anion(-)
• metal has constant charge

                        Metals                                                                                  Non-Metal

name of metal does not change                                           take ending off and replace with -ide
no changes to end                                                                ions written with negative charge
ions are written with + charge          

Type 2

Characteristics

• metal from transitional block
• roman numerals

Type 3

Characteristics

• no metals
• prefixes used

1 Mono-

2 Di-

3 Tri-

4 Tetra-

5 Penta-

6 Hexa-

7 Hepta-

8 Octa-

9 Nona-

10 Deca-

Polyatomic Ions

practice naming

Polyatomic

Characteristics

• cannot alter form
• use () when using more than one ion

The memorization for the polyatomic ion test was stressful. Trying to remember the charges was the hardest part. Each ion has a different number with different names. The Chlorate family was most difficult because they were all so similar.