Across
- An extremely dense object found in space is a neutron ___
- The charge on the particle Rutherford used to probe the atom
- If an alpha particle had a head-on collision with a nucleus, it would deflect at an angle or one hundred and ___ degrees.
- This radiation can easily dislodge an electron in DNA and cause cancer.
- If a light or electromagnetic source was below the ____ frequency, in the photoelectric effect, electrons were never were ejected from the photoemission metal.
- An alpha particle is so small because is only made up of 2 neutrons and 2 ______
- Before Rutherford, scientist believed that the atom was ____ packed.
- All the positive charge in the atom is found here
- When a photon collides with an electron ____ is always conserved.
- Most of the ___ of the atom is found in the nucleus.
- Most of the volume of the atom is ____ ____ (no spaces)
- The energy of a photon is directly related to its ____
- Name for a particle of light
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Down
- An alpha particle that passed close to the nucleus was ______ at a very large angle.
- Rutherford shot ___ particles at a thin gold foil
- This was the last subatomic particle to be discovered.
- The 1st experiment to prove that light had a particle behavior. ________ effect
- While the atom is made up of mostly empty space, you cannot walk through a wall because the empty space is filled with an ___ ___ (2 words, no space)
- The force that deflects the alpha particle is sometimes called a ___ force
- After an x-ray photon hits an electron and knocks it out of an atom, its _________ increases.
- _____ explained the photoelectric effect.
- This particle is small enough to act like a wave and a particle.
- To protect our skin from __ rays from the sun we put on suntan lotion.
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