Waves
Do waves transfer energy, matter, or both?
Energy only!
In which state of matter are particles packed most tightly together?
Solids
How many outer electrons does Fluorine (F) have?
7
What is the magic number of outer electrons for stability?
8
A student measures the mass of some reactants before and after they react. The mass before and after the reaction are the same. What scientific law does this demonstrate?
The Law of Conservation of Mass
As the frequency of a wave increases, what happens to the wavelength?
Wavelength decreases
Stars are primarily made up of which state of matter? (Hint: We don't see this state much on earth)
Plasma
Which of these elements is a metal?
Be, B, C, N
Be
Use the reference to determine which of the following compounds is ionic:
NaF2, CO2, NH3, HCl
NaF2
Give an example of a chemical change
Answers will vary
Which wave is transverse and which wave is longitudinal?
right - transverse
left - longitudinal
In which state of matter do particles have the most kinetic energy?
Gas
What would the charge be on an ion of oxygen (O)?
-2
What is the name of this polyatomic ion:
PO43-
Phosphate
What is the charge of each subatomic particle (proton, neutron, electron)
proton - positive
neutron - neutral
electron - negative
What is the speed of a sound wave that has a wavelength of 2.0 m and a frequency of 170.5 Hz
(v = λf)
2.0 m x 170.5 Hz = 341 m/s
Based on the graph, what happens to the volume of a gas as the pressure increases?
Volume is decreasing
Name 2 elements with similar properties to Neon (Ne).
Acceptable answers: He, Ar, Kr, Xe, Rn, Og
What is the name of this compound? Refer to the table
N2O3
dinitrogen trioxide
Is a bowl of cereal a heterogeneous or homogeneous mixture?
Heterogeneous
On the image of the wave, which number shows the wave's amplitude?
2
On the phase change graph, which sections represent where water is changing phase?
B & D
An isotope of Dubnium (Db) has a mass number of 270. How many neutrons does this isotope have?
270 -105 = 165 neutrons
What would the formula be when Lithium (Li) bonds with Nitrogen (N)?
Li3N
What type of nuclear decay is shown here?
8738Sr -> 8738Sr + 𝛄
gamma decay