New Worksheet - Atomic Models and Radioactive Decay (II)

Use a periodic table to help you answer the questions below.

1. What is the atomic number for cobalt?
Answer: ___________________

2. Give the information about what the Bohr model says a arsenic-75 atoms looks like. (Electron capacity for each orbit: orbit 1 is 2 electrons; orbit 2 is 8 electrons; orbit 3 is 18 electrons; orbit 4 is 32 electrons; orbit 5 is 50 electrons).
number of protons ___________________
number of neutrons ___________________
number of electrons in orbit 1 ___________________
number of electrons in orbit 2 ___________________
number of electrons in orbit 3 ___________________
number of electrons in orbit 4 ___________________
number of electrons in orbit 5 ___________________

3. A radioactive isotope with a half-life of 5 hours is used in scientific research. If a scientist starts with 2,000 grams of the isotope, how many grams will be left in 35 hours?
Answer: ___________________

4. Find the daughter products of Cm-247 if undergoes alpha, beta, and gamma radiation.
alpha: ___________________
beta: ___________________
gamma: ___________________

© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Parallelograms and Triangles

Practice surface area calculations for parallelograms and triangles with this worksheet.

To determine the area of a parallelogram, multiply the length by the height.
To determine the area of a triangle, multiply the base of the triangle times ½ and times the height.

Find the solutions to the following problems:
1. A parallelogram has a length of 6 inches and a height of 3.7 inches. What is the area?
____________________


2. A parallelogram has a length of 8.2 inches and a height of 2.5 inches. What is the area?
____________________


3. A parallelogram has a length of 9.3 inches and a height of 4 inches. What is the area?
____________________


4. A triangle has a base of 8.1 inches and a height of 3.8 inches. What is the area?
____________________


5. A triangle has a base of 3.27 inches and a height of 2.86 inches. What is the area?
____________________


6. A triangle has a base of 17.6 inches and a height of 7.4 inches. What is the area?
____________________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Naming Compounds

Practice naming chemical compounds with these exercises:


Give the chemical formula for each of the following compounds:

diphosphorus hexasulfide _________________________________________

dinitrogen tetrafluoride _________________________________________

nitrogen monchloride _________________________________________

tetraphosphorus hexasulfide _________________________________________

carbon tetrabromide _________________________________________

iodine trichloride _________________________________________

dibromine heptoxide _________________________________________

lithium phosphide _________________________________________

calcium sulfide _________________________________________

aluminum bromide _________________________________________

magnesium sulfite _________________________________________

ammonium nitride _________________________________________

potassium cyanide _________________________________________

lithium acetate _________________________________________

beryllium hydroxide _________________________________________

sodium carbonate _________________________________________

calcium phosphate _________________________________________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Conversions Word Problems

Practice word problems and conversions between the metric system and the English system with this worksheet.



1. A road is measured to be 379 feet long. What is the distance in meters? (1 foot = 12 inches; 1 inch = 2.54 cm; 100 cm = 1 meter) Round your answer to the nearest one's place.




2. Convert 67 cm to inches. (1 inch = 2.54 cm) Round your answer to the nearest one's place.




3. Convert 21 liters to gallons. (3.79 liters = 1 gallon) Round your answer to the nearest tenths.




3. Convert 65 liters to gallons. (3.79 liters = 1 gallon) Round your answer to the nearest tenths.




4. Convert 39 gallons to liters. (3.79 liters = 1 gallon) Round your answer to the nearest hundreth.




5. Convert 53 meters to feet. (1 foot = 12 inches; 1 inch = 2.54 cm; 100 cm = 1 meter) Round your answer to the nearest one's place.




6. Convert 16 feet to meters. (1 foot = 12 inches; 1 inch = 2.54 cm; 100 cm = 1 meter) Round your answer to the nearest one's place.




7. Convert 52 feet to cm. (1 foot = 12 inches; 1 inch = 2.54 cm) Round your answer to the nearest one's place.



© 2018 Laura Glassel – lizzietutoring.blogspot.com