₃Li, ₁₄Si, ₂He, ₁₁Na, ₁₅P Which of these elements belong to be period 3? Write down the electronic configuration of the elements from the given atomic numbers.
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The elements belonging to the Periods 3 are ⇒
Sodium (Na).
Phosphorus(P)
Silicon(Si)
He (or Helium) and Li (or Lithium) belongs to the Periods 2.
Now, the Electronic Configuration of the given elements are ⇒
Na = 2,8,1.
P = 2,8,5
Si = 2,8,4.
Li = 2,1
He = 2
Hope it helps.
Sodium (Na).
Phosphorus(P)
Silicon(Si)
He (or Helium) and Li (or Lithium) belongs to the Periods 2.
Now, the Electronic Configuration of the given elements are ⇒
Na = 2,8,1.
P = 2,8,5
Si = 2,8,4.
Li = 2,1
He = 2
Hope it helps.
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