Atomic Structure
Significant Figures
Scientific Notation
Unit Conversions
Mixed Practice
100
Name one of the three types of particles that make up an atom.
Proton, neutron, or electron
100
How many significant figures are in the number 7?
One significant figure
100
Why is the number 25.4 x 10^9 not in scientific notation?
25.4 is not between 1 and 10.
100
If 12 eggs = 1 dozen eggs, what is a conversion factor can be written from this equality?
(12 eggs) / (1 dozen eggs) OR (1 dozen eggs) / (12 eggs)
200
What is the charge of an electron? (Sign and number)
An electron has a -1 (negative one) charge.
200
How many significant figures are in the number 1.23 x 10^3?
Three significant figures
200
What is 235 in scientific notation?
2.35 x 10^2
200
How many milliliters are in one liter?
1000
300
What does the term "atomic number" mean?
An atomic number is the number of protons in an atom.
300
How many significant figures are in the number 2500?
Two significant figures
300
What is 0.857 in scientific notation?
8.57 x 10^(-1)
300
How many kilograms are in 35 grams?
0.035 kg
300
Calculate to the correct number of significant figures: (25 x 3) =
80
400
What are atoms called when they have the same number of protons but different numbers of neutrons?
Isotopes
400
How many significant figures are in the number 0.0002017?
Four significant figures
400
What is 0.07 x 10^7 in regular decimal form?
700000
400
An object that weighs 2 grams has a density of 5 g/mL. How many mL does this object occupy?
0.4 mL
400
Calculate, writing your answer with the correct number of significant figures AND in scientific notation: (2400 / 200) =
1 x 10^2
500
What is the term for the number of protons in an atom plus the number of neutrons in an atom?
Mass number
500
How many significant figures are in the number 02.30 x 10^5?
Three significant figures
500
What is 9301 x 10^(-5) in regular decimal form?
0.09301
500
How many centimeters are in a kilometer?
100,000 cm in 1 km
500
Calculate, writing your answer with the correct number of significant figures: (0.60 x 10^3) / (2.00 x 10^2)
3.0
M
e
n
u