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WorksheetsEM Radiation and Electrons
Total questions: 42
Worksheet time: 22mins
Energy that travels in waves is called
wavelength
frequency
atoms
electromagnetic radiation
All atoms emit energy because...
atoms vibrate
electrons are constantly moving inside the atom
the nucleus is unstable
electrons and protons are attracted to each other
There are ______ possible energy levels in an atom.
1
7
4
8
Which is true about electrons? Choose 3!
they are positive
an electron moves farther from the nucleus when it absorbs energy
electrons can orbit at different distances from the nucleus depending on their energy
electrons that absorb energy are excited
Why do chemists do flame tests on atoms?
to watch the pretty colors
because they're bored
to watch the atoms explode
to determine the energy level of electrons
The energy atoms emit during a flame test is what type of EM radiation?
visible
ultraviolet
gamma
infrared
What TWO properties do all EM waves have?
frequency
wavelength
conductivity
reactivity
The distance between two crests of a wave is called
kinetic energy
wavelength
frequency
Hertz
The number of wave vibrations in one second is called
wavelength
energy
frequency
nm
What type of waves are EM radiation?
sound
transverse
longitudinal
surface or circular
Which is NOT a type of EM wave?
x-ray
radio
sound
microwave
Wavelength is measured in... Choose two!
Hertz
Joules
meters
nanometers
Which wave has the longest wavelength?
Which wave has the highest frequency?
Which wave has the most energy?
What is true about this image? Choose 3!
They are line emission spectra.
The lines represent wavelengths of light emitted by excited electrons.
each element has its own unique spectrum.
The lines all have the same wavelength.
3.4 x105 m is a _____________ wavelength than 5.6 x106 m.
longer
shorter
1.9 x1014 Hz is a ____________ frequency than 2.7 x1014 Hz.
lower
higher
9.45 x10-5 m is a ___________ wavelength than 8.75 x10-3 m.
longer
shorter
What does it mean to "emit" energy?
to take energy in
to give energy off
to be a type of wave
to move in an orbit
The EM spectrum is...
a list of all the types of EM radiation
a description of the uses of each type of EM radiation
a type of high-energy EM radiation
the color an atom emits during a flame test
Which type of EM radiation has the shortest wavelength?
radio
ultraviolet
violet
gamma
Which type of EM radiation has the longest wavelength?
gamma
red
radio
microwave
What is the only type of EM radiation humans can see?
x-rays
microwaves
radio waves
visible light
What type of EM radiation has a wavelength of 650 nm?
red
yellow
orange
ultraviolet
Transverse waves vibrate
back and forth
up and down
in circles
How many electrons can fit in an orbital?
1
4
7
2
An EM wave has a wavelength of 7.7 x10-4 m. What type of EM radiation is it?
gamma
radio
infrared
visible
An EM wave has a wavelength of 5.0 x10-10 m. What type of EM radiation is it?
gamma
x-ray
ultraviolet
microwave
Which type of EM radiation has higher energy than visible light? Choose 2!
microwave
x-ray
ultraviolet
infrared
There are _____ types of sublevels.
4
100
18
2
Energy levels are divided into
sublevels
electrons
EM radiation
orbitals
Which type of EM radiation can be used to cook food?
microwaves
gamma
ultraviolet
x-rays
What is true about EM waves?
gamma rays have longer wavelengths than x-rays
x-rays have shorter wavelengths than ultraviolet
infrared waves have shorter wavelengths than visible light
microwaves have longer wavelength than radio waves
Which type of EM radiation has the most energy?
gamma
red
radio
microwave
Which color of visible light has the shortest wavelength?
violet
red
blue
orange
Look at where the arrow is pointing. What do these numbers stand for?
energy levels
sublevels
electrons
Look at the arrows. What do the large numbers stand for?
energy levels
sublevels
electrons
orbitals
Look at the arrows. What do the letters stand for?
energy levels
sublevels
electrons
orbitals
What is the atomic number of the element with this electron configuration?
25
27
28
26
What are the circles in this model of an atom?
energy levels
sublevels
orbitals
Which statement is true? Choose two!
n=7 has the most energy
n=1 has more energy than n=2
n=3 can hold more electrons than n=2
n=1 has more sublevels than n=2
