Answer:
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Explanation:
12 seconds
The mass number of a certain atom is the combined number of proton and neutrons. For a sodium atom, the number of proton is 11 and the number of neutron is also 11 (if this sodium is neutral). Thus, the mass number is 22. Then, there combines another particle with 2 protons and 2 neutrons, the new mass number is equal to 26.
Answer:
The amount of the sun energy that could be collected.
Explanation:
Some limitations are, the amount of the sun's energy that could be collected the radiation of sun is nearly fixed. The place where we can put the solar panels are also limited.
