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ARRT Level 1 Module 1 JKO.

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ARRT Level 1 Module 1 JKO.

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ARRT Level 1 Module 1 JKO
How much radioactivity is left?
Initial Activity- 17 Ci of Cf-252
Time Elapsed- 6 years, 7 months
Half Life- 2.6 years - ANS-2.87 Curies

How much radioactivity is left?
Initial Activity- 310 Ci of Co-60
Time Elapsed- 12 years, 2 months
Half Life- 5.27 years - ANS-62.6 Curies

How much radioactivity is left?
Initial Activity- 8 Ci of Cs-137
Time Elapsed- 21 years, 4 months
Half Life- 30 years - ANS-4 Curies (might be wrong, sorry!)

How much radioactivity is left?
Initial Activity- 6 Ci of Sr-90
Time Elapsed- 16 years, 3 months
Half Life- 28.8 years - ANS-4.06 Curies

If uranium has 92 protons and an isotope has 143 neutrons, what is the mass number of
the isotope? - ANS-235

Is an isotope has an atomic number of 92 and a mass number of 196, what is the
number of neutrons? - ANS-104

Match the atomic particles with their respective charges. - ANS-Electron- Negative
Nucleus- Neutral
Proton- Positive

What is the term used to describe the actual mass of an atom? - ANS-Atomic Weight

What is the term used to describe the number of protons and neutrons in the atom? -
ANS-Atomic Mass

What is the term used to describe the number of protons in the nucleus of an atom? -
ANS-Atomic Number

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