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What is the correct order of elements according to their valence shell electrons?

ANe>N> F > Be

BF>O>C>Li

CLi>O>C>F

DB>C>O>F

Answer:

B. F>O>C>Li

Read Explanation:

  • The Correct Answer is (b) F > O > C > Li


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Which of the following triads is NOT a Dobereiner's triad?

  1. (i) Li, Na. K
  2. (ii) Ca, Sr, Ba
  3. (iii) N, P, Sb
  4. (iv) Cl, Br, I
    In modern periodic table Group number 13 is named as ?

    Select the incorrect statements from among the following.

    1. (i) Newland arranged the elements in the order of increasing atomic masses and gave the law of Octaves.
    2. (ii) Sodium is the eighth element after lithium.
    3. iii) Calcium is the eighth element after Beryllium.
    4. (iv) The law of Octaves was applicable only up to Magnesium, as after Magnesium every eighth element did not possess properties similar to that of the first.
      Mn2O7 ൽ ന്റെ Mn ഓക്സീകരണവസ്തു എത്ര ?