Density
What is the formula for density?
D=M/V
What is the formula for speed?
S=D/T
What are the 3 parts of an atom? Where are they located?
Protons and neutrons are in the nucleus. Electrons are moving around the nucleus
When is potential energy the highest?
At the top
Metal, Nonmetal, metalloid?
1. Shiny, semiconductor of electricity
2. Excellent conductor of electricity
3. Malleable, poor conductor of electricity
1. Metalloid
2. Metal
3. Nonmetal
The sample has a mass of 19.3/g and a volume of 5.2cm3. What is the density of the sample?
3.71
A toy plane flys 8 meters in 5 seconds. What is the speed of the plane?
1.6
True or False: As potential energy decreases, kinetic energy increases.
True
Compound or element?
1. Two or more elements/uppercase letters
2. Only one type of element/ 1 capital letter
1. Compound
2. Element
The sample has a mass of 26.8/g and a volume of 5.3cm3. What is the density of the sample?
5.06
What is the formula for distance?
speed x time
Elements on a periodic chart are organized, left to right and top to bottom, in order of...
Increasing atomic number
Is chewing your food a chemical or physical change? Is digesting your food chemical or physical change?
Physical/ Chemical
What makes noble gases unique?
They are odorless, colorless, and nonreactive
Bob fills a graduated cylinder with 19mL of water. Bob drops a quarter in the water that weighs 0.8g. The meniscus is now at 21mL of water. What is the density of the quarter?
0.4
If a car travels 31 km per hour, how far will the car go in 2 hours?
62km/hr
The number of protons is the same as...
The atomic number and the number of electrons
Cody and Adam are pulling a rope. Cody is pulling the rope 24N to the left and Adam is pulling the rope 13N to the right. What is the net force acting on the rope?
11N to the left.
True or False: The number of protons determines the identity of an atom?
True
Suzy fills a graduated cylinder with 29mL of water. Suzy drops a nickel in the water that weighs 7g. The meniscus is now at 13mL of water. What is the density of the nickel?
0.43g
Trial 1: Distance- 26 Time- 4
Trial 2: Distance- 19.5 Time- 3
Trial 3: Distance- 13 Time- 2
What is the average speed of the three trials?
6.50
What makes up the mass of an atom?
1. Protons and electrons
2. Neutrons and electrons
3. Protons and neutrons
3. Protons and neutrons
Baking soda and vinegar mix together and create bubbles and blow up a balloon. Is this a chemical or physical change? Why?
Chemical change because a gas was produced
How many neutrons, protons, and electrons are in the element Hafnium?
Neutrons- 106
Protons- 72
Electrons- 72