A vertical column on the periodic table is called what?
A group.
100
How many significant figures are in 215?
3
100
What are the 3 units used to measure temperature?
Celsius, Fahrenheit, and Kelvin
100
What are the 3 base units?
Hint: used to measure mass, length, and volume.
Meter, Liter, Gram
200
There are 4 signs that a chemical change may have occurred. List 2 of these signs.
1- gas
2-precipitate
3-energy absorbed/released
4- color change
200
What element is #52?
Tellurium
200
How many significant figures are in 2,018?
4
200
What is the difference between heat and temperature?
Heat is energy.
Temperature is the measure of that energy.
200
Draw the triangle used to show the equations of density, mass, and volume.
Density = Mass / Volume
300
What is the difference between exothermic and endothermic?
Exothermic has energy being released and endothermic has energy being absorbed.
300
What element has a symbol of Au?
Gold
300
How many significant figures are in 40,510?
4
300
Convert 23 degrees Celsius to Kelvin.
296K
300
Which unit is larger, hecto or deci?
Hecto
400
Complete this statement:
When talking about chemical reactions, the object/substnace being studied is called _______________.
The system
400
What does the atomic number tell us?
The number of protons and electrons.
400
When adding and subtracting, your answer is limited how?
To the fewest decimal places.
400
Convert 410 degrees F to degrees C.
210
400
What is the correct abbreviation for "deca"?
da-
500
Which of the following describe ONLY an endothermic reaction? (may be multiple answers)
A- energy is released
B- melting ice cream is an example
C- Identified by a change in temperature
D- Instant handwarmers are an example
B
500
Which element on the periodic table is an "oddball" because of its valence electron count?
Helium
500
Multiply 510.2 x 67 and round your answer accordingly.