Matter & Measurement
Which branch of science focuses on the properties and changes of substances?
What is chemistry?
Express 7200 g in scientific notation.
What is 7.2 × 10³ g?
How many electrons fit in the p orbital?
6 electrons
Which type of electromagnetic wave has the lowest frequency?
Radio waves
Chemical symbol for potassium?
K
The degree to which a measurement matches the actual value is called what?
What is accuracy?
Multiply 3.5 × 10³ cm and 2.0 × 10² cm with correct sig figs.
What is 7.0 × 10⁵ cm²?
What is the electron configuration of nitrogen?
1s2 2s2 2p3
Which color of visible light has the longest wavelength?
Red
Density of an object with a mass of 12 grams in a volume of 150 mL?
0.08 g/mL
In the measurement 2.307 L, which digit is estimated?
7
Express the product of 6.0 mm and 4.00 mm using correct sig figs.
What is 24. mm²?
Using noble gas configuration, what is the electron configuration of sulfur?
[Ne] 3s2 3p4
What happens when electrons in a compound absorb energy?
jump to higher energy levels
Rusting is an example of a ________ change
chemical
What is the SI unit used to measure temperature?
What is Kelvin
Add 4.2 × 10⁴ and 3.8 × 10⁴.
What is 8.0 × 10⁴?
Draw the orbital diagram of fluorine.
drawing
What is the frequency of a radio wave with a wavelength of 27 meters?
1.11E7
Name any heterogeneous solution
May vary: Salad, cereal, etc
Which contains the most matter?
Golf ball, soccer ball, bowling ball, basketball
Bowling ball
Showing your work using the railroad track method, how many years are in a 50 minute class period?
9.51*10^-5 years
How many unpaired electrons does phosphorus have?
3
What is the frequency of a wave with wavelength 900 nanometers (1 nm= 10^-9 m)
3.33E14
How many protons, neutrons, and electrons are there in a K+ ion?
P: 19 N: 20 E: 18