Answer:
D
Explanation:
Einstein's equation E = m * c2, allows to determine the energy.
How to determine nuclear binding energy? To achieve it, the mass of the nucleons it is combined and transformed into energy, at the end of the process there is less mass in the system than there was before combining and converting into energy.
All atoms can be identified by the number of protons and neutrons they contain. The number of protons present in the nucleus of an atom of potassium - 42 is 19.
The particles which are smaller in size than an atom are called subatomic particles. An atom contains three sub atomic particles, they are protons, electrons and neutrons. The positively charged particles are called protons whereas the negatively charged particles are electrons.
The neutrons are chargeless particle. Here K - 42 is a radioactive isotope which has the atomic number 19. So the number of protons is 19 and the number of neutrons is:
A = Z + N
N = A - Z
= 42 - 19 = 23
The number of protons or electrons is the atomic number whereas the mass number is the sum of protons and neutrons.
Thus the number of protons is 19 and neutrons is 23.
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Which arrows represent the phase transitions in which heat energy is gained?
1, 2, and 3
2, 3, and 5
3, 4, and 5
4, 5, and 6
1, 2, and 3
hope it helps next time upload with picture