Question

Can someone help please? :)

1. Which phrase describes radioactive decay?

the spontaneous emission of radiation <
the joining of small nuclei into a larger nucleus
the splitting of a large nucleus into smaller nuclei
the triggering of one reaction by the products of another

2. Based on the nuclear symbol, how many protons are contained in the following isotope?
37 17 CI

17 <
20
37

3. Based on the nuclear symbol, how many neutrons are contained in the following isotope?
17 8 O

8
9 <
17
25

4. Which option would be an appropriate model of nuclear fusion?

adding a drop of water to a glass of water
sewing one piece of fabric to another
putting a puzzle together
mashing two marshmallows together <

5. Which types of particles are involved in a fission reaction?

A neutral neutron strikes a large positive nucleus. <
A positive proton strikes a large neutral nucleus.
A neutral neutron strikes a large neutral nucleus.
A positive proton strikes a large positive nucleus.

6. What best describes nuclear fusion?

There is little energy released during a nuclear fusion reaction
Nuclear fusion does not occur naturally in the universe
A nuclear fusion reaction requires an extraordinary amount of energy <
"splitting an atom" is common when describing nuclear fusion

7. In which type of radioactive decay does the nucleus become more stable without changing its identity?

gamma decay <
beta-plus decay
beta-minus decay
alpha decay

8. An alpha particle is equivalent to the nucleus of an atom of which element?

helium <
carbon
hydrogen
nitrogen

9. Gamma radiation is used to treat certain types of tumors deep in the brain that cannot be accessed with surgery. What possible reason to explain why gamma radiation is preferred over beta decay or alpha decay for this treatment?

Gamma radiation is not harmful to human tissue
Alpha decay has greater penetrating power than gamma radiation or beta decay <
When an atoms mass emits a beta particle, its mass does not change
Gamma radiation has greater penetrating power than beta or alpha decay

Answer 1

1) This is a definition.

2) Protons are given by the bottom number (since atomic number = number of protons).

3) Neutrons = (mass number)-(atomic number), which are the top and bottom numbers, respectively.

4) Nuclear fusion involves combining two things together, which is only reflected by the last option.

5) This is a fact.

6) This is a fact.

7) This is a fact.

8) This is a fact.

9) The correct option is the explanation.