\(\text{Mg}\) : There are two valence electrons in \(\text{Mg}\) atom.
⇒ Hence, the Lewis dot symbol for \(\text{Mg}\) is:
\(\text{Na}\) : There is only one valence electron in an atom of sodium.
⇒ Hence, the Lewis dot structure is:
\(\text{B}\): There are 3 valence electrons in Boron atom.
⇒ Hence, the Lewis dot structure is:
\(\text{O}\) There are six valence electrons in an atom of oxygen.
⇒ Hence, the Lewis dot structure is:
\(\text{N}\): There are five valence electrons in an atom of nitrogen.
⇒ Hence, the Lewis dot structure is:
\(\text{Br}\): There are seven valence electrons in bromine.
⇒ Hence, the Lewis dot structure is:
Give reasons for the following.
(i) King Tut’s body has been subjected to repeated scrutiny.
(ii) Howard Carter’s investigation was resented.
(iii) Carter had to chisel away the solidified resins to raise the king’s remains.
(iv) Tut’s body was buried along with gilded treasures.
(v) The boy king changed his name from Tutankhaten to Tutankhamun.
Find the mean deviation about the median for the data
xi | 15 | 21 | 27 | 30 | 35 |
fi | 3 | 5 | 6 | 7 | 8 |