Answer: The correct answer is option (A).
Explanation:
- Dmitri Mendeleev published periodic table in 1869.
- In his periodic table he arranged the elements in the increasing order of their atomic mass.
- His periodic table consist total 63 elements.
- He grouped the element on the basis of similarity of chemical and physical properties of the elements.
Hence, the correct answer is option (A)
Answer:
Hey how are you all doing the answer is 8.93 g
Explanation:
Answer:
When an atom is in an excited state, the electron can drop all the way to the ground state in one go, or stop on the way in an intermediate level. Electrons do not stay in excited states for very long - they soon return to their ground states, emitting a photon with the same energy as the one that was absorbed.
HOPE IT HELPS
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Particle exchange energy though elastic collision , hope this helps .
