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Nucleus
Protons and neutrons are packed tightly together in a _____.
Beta particle
An electron emitted during nuclear decay is called a _____.
Atomic number
The number of protons in the nucleus is called the _____.
Gamma rays
_____ are electromagnetic waves and are the most penetrating form of nuclear radiation.
Mass number
The number of protons and neutrons in the nucleus is called the _____.
Alpha particles is
made of two neutrons and two protons and is emitted from the decaying nucleus.
Isotope
Elements with the same number of protons but different number of neutrons are called ____.
Beta decay occurs when...
A neutron turns into a proton and electron
Beta decay releases...
One electron (______ particle) is released from the nucleus
How do beta particles behave
Move quickly
What effect beta radiation have on our bodies?
Can penetrate deeper than alpha particles, and can damage the body
Radioactivity
The process of nuclear decay where matter and energy is released from an atom
Alpha decay releases...
an _____ particle made up of two protons, two neutrons, and no electrons. This is a helium atom with a +2 charge
What can stop alpha particles
You can stop the particles with a piece of paper
What effect will alpha radiation have on our bodies?
It can still be damaging in our bodies due to electric charge
How do gamma rays behave?
Gamma rays the most penetrating of nuclear radiation
Protons chooses...
The atomic number and an element idenity
Where is most of the mass of an atom located?
Most of the mass is in the nucleus
Electron cloud
where electrons are located
Nucleus is
dense, positively charged (heavy)
Electron cloud is
large and has empty space so electrons can move through lightly, negative charged (Takes up most of the space)
Protons and neutrons have almost the same
mass
Electrons are much lighter than
protons and neutrons
Alpha penetrating power is
low (stopped by paper, skin, and clothes)
Beta penetrating power is
medium (stopped by metal foils)
Gamma penetrating power is
High (stopped by inches of lead or feet of concrete)
Helium (mass 4, +2 charge)
Alpha particle
mass 0, -1 charge
Beta particle
Y (No mass, no charge)
Gamma Y
