pH
What is the range of values on the pH scale?
0-14
What is the name of the family in Group 2?
Alkaline Earth Metals
Liquid A is more dense than liquid B. Which liquid will rest on top if they are in the same container?
Liquid B
(lower density will rise to the top)
A subway travels 15 miles into the city and then goes 10 miles away from the city. What was the total distance traveled?
25 miles
Which has a higher pH, baking soda or oven cleaner?
Oven cleaner
(13>9)
What pH values do acids have?
<7 pH
What is the trend of atomic radius as you go up a column on the periodic table?
What describes the amount of space something occupies?
Volume
A car drives 67,000 meters in 250 minutes. What was the speed of the car?
268 m/min
s = d / t
What is the name of the largest family of elements on the periodic table?
Transition Metals
What is the pH value of something neutral, like pure water?
pH = 7
What element on the periodic table has the lowest electron affinity?
Francium (Fr)
A sphere has a density of 7.8 g/mL and a volume of 15 mL. What is its mass?
117 g
m = p * V
A football is thrown at 30 feet per second and traveled a distance of 200 feet. How long did it take for the football to go that far?
6.67 seconds
t = d / s
Velocity is speed plus what?
Direction
If you use Methyl red to test tomatoes, what color would it change into?
Red (pH = 4)
What element has the smallest atomic radius?
Helium (He)
An object has a mass of 248 grams and a density of 55 grams per milliliter. What is its volume?
4.51 mL
V = m / p
A man walks 300 feet to the store from his house. He then walks to a cafe 150 feet back towards his house. What was his displacement?
150 feet
0 + 300 - 150 = 150
start: 0 end: 150 150 - 0 = 150
How does a position-time graph look when an object is not moving?
flat line
_______
If you use litmus to test something with a basic pH, what color would it change into?
Blue (pH > 7)
Which family does not include all of the elements in its column?
Alkali Metals (does not include Hydrogen)
A wooden block is placed in 500 mL of water, and the water level went up to 750 mL. If the block has a mass of 550 g, then what is the density of the block?
2.2 g/mL
V = 750 mL - 500 mL
p = 550 g / 250 mL
Over the course of 12 seconds a dog runs 50 feet forward towards a squirrel and then 10 feet backwards while chasing it. What was the dog's average velocity?
3.33 ft/s
v = displacement / time
v = 40 ft / 12 s
Which family of elements has stable and nonreactive elements?
Noble Gases