Answer:
chlorine
Explanation:
sodium chloride, it is missing chlorine
Answer
B) photon
Explanation
The electrons in an atom tend to be arranged in such a way that the energy of the atom is as low as possible. The ground state of an atom is the lowest energy state of the atom. When those atoms are given energy, the electrons absorb the energy and move to a higher energy level. These energy levels of the electrons in atoms are quantized. An excited state of an atom is a state where its potential energy is higher than the ground state. An atom in the excited state is not stable. When it returns back to the ground state, it releases the energy that it had previously gained in the form of electromagnetic radiation. These energies are in form of photon.
Hence, electrons in atoms exist in particular energy levels. A photon must be emitted or absorbed to move between energy levels.
The correct answer is option B) photon
<span>A. Missing part is ⁴He₂
You can also calculate it by adding/subtracting for atomic mass & atomic numbers
Hope this helps!
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A . O2- because it is a negatively charged ion
Answer:
A I did the exam and I saw A sorry if it is wrong dont have the best of memory
