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Nuclear changes

Terms in this set (54)

1 cm
If an atom= 1 km the nucleus=?
2,000
Mass of one proton or neutron is almost _______ times greater than an electron
Protons
________ repel each other
Strong force
Causes neutrons and protons to be attracted to each other
Strong force
What holds the nucleus together
Close together
Neutrons and protons need to be ____________ for a strong force to work
Electromagnetic force, gravity, strong force, weak force
4 forces of nature
Small nucleus
In a _________ __________ strong force can attract all protons in a nucleus
Large nucleus
In a _________ ___________ the protons are attracted to each other by the strong force
Electromagnetic force
What is pushing the protons and the neutrons apart?
Repulsive force
What force increases?
Strong force
What for stays the same?
radioactive nuclei
Nuclei that decay
Nucleus with Large number of protons and neutrons
What kind of nuclei tend to be unstable?
More than 83
All elements with _____________ protons are radioactive
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