1. F: 1s2 2s2 2p5
Cl:1s2 2s2 2p63s2 3p5
Br:1s2 2s2 2p63s2 3p6 4s2 3d10 4p5
All of the halogens end with 5 electrons in an outer p shell.
2. Li: 1s2 2s1
Na: 1s2 2s2 2p6 3s1
K: 1s2 2s2 2p6 3s2 3p6 4s1
All of the alkali metals end with a single electron in their outer s shell.
Tuesday, September 22, 2015
Monday, September 21, 2015
Homework 9/17/18
1. First calculate frequency: v = 3.00 x 108 / 4.36 x 10-7 = 6.88 x 1014
Next multiply by plank's constant: E = 6.88 x 1014 /s X 6.626 x 10-34Jxs = 4.66 x 10-19 J
2. The only transition that would result in the emission of light is the first on 3p to 3s.
3. 5.08 x 1014/s and 5.09 x 1014/s
2. The only transition that would result in the emission of light is the first on 3p to 3s.
3. 5.08 x 1014/s and 5.09 x 1014/s
Thursday, September 17, 2015
Homework 9/16/15
1. (4 x 10-7/s) v = 3.00 x 108m/s
v = 7.5 x 10-7
2. 0.5m x v = 3.00 x 108
v = 6.00 x 109
3. v = 1019
wavelength = 3 x 10-11
v = 7.5 x 10-7
2. 0.5m x v = 3.00 x 108
v = 6.00 x 109
3. v = 1019
wavelength = 3 x 10-11
Wednesday, September 16, 2015
Monday, September 14, 2015
Dimensional Analysis Worksheet
1. 5400 inches into miles.
5400 inches x 1 foot x 1 mile = 0.085 miles
12 inches 5280 ft .
2. 16 Weeks into seconds
16 weeks x 7 Days x 24 hours x 60 minutes x 60 seconds = 9,676,800 seconds
1 week 1 day 1 hour 1 minute
3. 54 yards in mm
54 yards x 3 feet x 12 inches x 2.54 cm x 10 mm = 49,377 mm
1 yard 1 foot 1 inch 1 cm
4. 36 cm/sec. into miles/hour
36 cm x 1 inch x 1 foot x 1 mile x 60 sec. x 60 min = .81 miles/hr.
sec. 2.54 cm 12 inches 5280 ft. 1 min. 1 hr.
5. 1.09 g/ml into lbs./gallon
1.09 g x 1 lb. x 946ml x 4 qts. = 9.08 lbs./gal.
ml 454 g 1 qt. 1 gal.
6.
15 people x 4 slices x 1 pizza x $14.78 = $73.90
1 person 12 slices 1 pizza
7.
28 students x 3 pens x 1 package x $1.44 = $15.12
1 student 8 pens 1 package
8. 13,406,190 pennies x 1 dollar = $134, 061.90
100 pennies
13,406,190 pennies x 4 grams x 1 pound = 118,116.211 lbs.
1 penny 454 grams
5400 inches x 1 foot x 1 mile = 0.085 miles
12 inches 5280 ft .
2. 16 Weeks into seconds
16 weeks x 7 Days x 24 hours x 60 minutes x 60 seconds = 9,676,800 seconds
1 week 1 day 1 hour 1 minute
3. 54 yards in mm
54 yards x 3 feet x 12 inches x 2.54 cm x 10 mm = 49,377 mm
1 yard 1 foot 1 inch 1 cm
4. 36 cm/sec. into miles/hour
36 cm x 1 inch x 1 foot x 1 mile x 60 sec. x 60 min = .81 miles/hr.
sec. 2.54 cm 12 inches 5280 ft. 1 min. 1 hr.
5. 1.09 g/ml into lbs./gallon
1.09 g x 1 lb. x 946ml x 4 qts. = 9.08 lbs./gal.
ml 454 g 1 qt. 1 gal.
6.
15 people x 4 slices x 1 pizza x $14.78 = $73.90
1 person 12 slices 1 pizza
7.
28 students x 3 pens x 1 package x $1.44 = $15.12
1 student 8 pens 1 package
8. 13,406,190 pennies x 1 dollar = $134, 061.90
100 pennies
13,406,190 pennies x 4 grams x 1 pound = 118,116.211 lbs.
1 penny 454 grams
Wednesday, September 9, 2015
Homework 9/8/15
1. 10 gal. x 3.8 Liters = 38 Liters
1 Gal.
2. 200.0 miles x 1.6 Km = 320 Km
1 mile
3. 85 miles x 1 hour x 1 min. x 5280 Feet = 124.7 feet/sec.
1 hour 60 min. 60 sec. 1 mile
1 Gal.
2. 200.0 miles x 1.6 Km = 320 Km
1 mile
3. 85 miles x 1 hour x 1 min. x 5280 Feet = 124.7 feet/sec.
1 hour 60 min. 60 sec. 1 mile
Wednesday, September 2, 2015
Unit 1 Review
1. Draw a simple flow chart outlining
the steps of the scientific method. Include what happens if the experiment does
not agree with the hypothesis.
2. What are the metric units used to
measure length/distance, mass, volume, temperature, and time? What are their
abbreviations?
3. Write the following numbers in
scientific notation.
A. 25,030,000
B. 0.000258
C. 34,003,000,000,000
D. 0.00000000314
4. Do the following conversions.
A. Convert 100 milliliters into liters.
B. Convert 450 grams into milligrams.
C. Convert 320 centimeters into meters.
D. Convert 4 kilograms into grams.
E. Convert 5,930 liters into
milliliters.
5. How many significant figures are in
the following numbers?
A. 422.002
B. 50.20
C. 50,000,000,000
D. 599
E. 93.0
6. Solve the following problems with
answers with the correct number of significant figures
A. 10.5 * 22
B. 60.0 + 22.543
C. 533.215 – 255.01
D. 5586.251 / 5.2
E. 525 + 22.156
F. 22.2 * 562.12
G. 633.1 – 52.256
7. Are the following chemical or
physical changes?
A. Ice melting
B. Gasoline burning
C. Table salt (sodium chloride) dissolving
in water
D. Iron rusting
E. Breaking a glass
F. Protein being digested into amino
acids
8. What are the three subatomic
particles that atoms are made of and what are their charges?
9. If an atom has twenty six protons,
thirty neutrons, and twenty six electrons what is its atomic number? What is
its atomic weight? What element is it? What is its symbol?
10. Which are heavier electrons or
protons?
11. Are the following elements metals, nonmetals or semimetals?
A. Cobalt (Co)
B. Xenon (Xe)
C. Boron (B)
D. Calcium (Ca)
E. Oxygen (O)
F. Tungsten (W)
11. Are the following elements metals, nonmetals or semimetals?
A. Cobalt (Co)
B. Xenon (Xe)
C. Boron (B)
D. Calcium (Ca)
E. Oxygen (O)
F. Tungsten (W)
Homework 9/1/15
Classify the following elements as metals, non-metals, or metaloids:
A. Calcium - metal
B. Florine - non-metal
C. Germanium - metaloid
D. Palladium - metal
E. Xenon - non-metal
To what group do the following elements belong?
A. Sodium - Group 1 Alkali Metal
B. Zirconium - Group 4 Transition Metal
C. Cerium - Lanthanide
D. Iodine - Group 17 Halogen
E. Krypton - Group 18 Noble Gasses
A. Calcium - metal
B. Florine - non-metal
C. Germanium - metaloid
D. Palladium - metal
E. Xenon - non-metal
To what group do the following elements belong?
A. Sodium - Group 1 Alkali Metal
B. Zirconium - Group 4 Transition Metal
C. Cerium - Lanthanide
D. Iodine - Group 17 Halogen
E. Krypton - Group 18 Noble Gasses
Tuesday, September 1, 2015
Homework 8/31/15
1. A chemical change involves a chemical reaction where new substances are created. In a physical change the substance or substances involved stay the same, just change form.
2. A. Physical Change
B. Chemical Change
C. Physical Change
D. Chemical Change
2. A. Physical Change
B. Chemical Change
C. Physical Change
D. Chemical Change
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