Chemistry
Fill in the blanks with appropriate word/s from the brackets :
Covalent compounds are formed by sharing electron pairs between non-metallic atoms. Non-metallic atoms having …………… , …………… , …………… valence electrons (4, 5, 6, 7) share one, two or three pairs of electrons respectively.
Related Questions
Fill in the blanks with appropriate word/s from the brackets :
NaCl an electrovalent compound is formed as a result of transfer of …………… (one, two, three) valence electrons from metallic sodium to non-metallic chlorine atom. CaO is similarly formed as a result of transfer of …………… (one, two, three) valence electron/s from metallic calcium to non-metallic oxygen and magnesium chloride by transfer of …………… (one, two, three) valence electron/s from …………… (one, two) magnesium atom/s to …………… (one, two) chlorine atom/s.
Explain with the help of :
(i) an ionic equation
(ii) electron dot structural diagram
the formation of the following :
(a) Sodium chloride
(b) Calcium oxide
(c) Magnesium chloride.
(at. nos. Na = 11, Cl = 17, Ca = 20, O = 8, Mg = 12)
Give two differences between the covalent compounds – methane (non-polar) and HCl (polar)
Define or explain the terms:
(i) Covalent or molecular bond
(ii) Covalent or molecular compound
(iii) Covalency
(iv) Shared pair of electrons.