1-To make an alpha particle fuse with the nucleus of another atom, you need to a
ID: 997344 • Letter: 1
Question
1-To make an alpha particle fuse with the nucleus of another atom, you need to
aim carefully
give the alpha particle a negative charge
give the alpha particle a large amount of energy
slow the particles down by cooling
2-The missing nucleus in the equation shown below is
230Th 4He + ?
234U
234Ra
226Ra
226U
3-What type of particle is emitted when a U-235 decays to Np-235?
alpha particle
beta particle
neutron
helium nuclei
4-The product of the gamma decay of lead-210 is
bismuth-210
lead-210
bismuth 209
lead-209
5-The product of the beta (0-1) decay of thorium-234 is
uranium-238
protactinium-234
uranium-234
uranium-235
6-Stable nuclei (that is, nonradioactive nuclei) have mass numbers that are
equal to the atomic number
twice as large as the atomic number or even larger
ten times the atomic number
less than twice as large as the atomic number
7-Which is the opposite of an electron?
-particle
positron
neutron
-particle
A.aim carefully
B.give the alpha particle a negative charge
C.give the alpha particle a large amount of energy
D.slow the particles down by cooling
Explanation / Answer
1. C
2. C.
When one alpha proton comes out atomic number decrease by 2 and atomic weight by 4. Which is here Radium atomic number 88 and atomic mass 226.
3. B
In beta decay atomic number increase by 1 (here 92 to 93) and atomic mass remains same.
4. B
On gamma decay atomic number and mass does not change.
5. B
Atomic mass remains same but atomic number increased by one.
6. B
7. B
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