Chemistry
Give reasons for the following:
In the formation of MgO the magnesium atom (at. no. 12) loses two electrons from it's valence shell.
Answer
Electronic configuration of Mg (Z = 12) = 2, 8, 2
Electronic configuration of O (Z = 8) = 2, 6
Mg (metal) has a tendency to lose two valence electrons and attain a stable state (Ne = 2,8). On the other hand, O (non-metal) has a tendency to gain two electron and attain a stable state (Ne = 2,8). Hence, when the two atoms fuse together to form MgO, then Mg loses two electrons and O gains two electrons and they form a electrovalent bond.
Related Questions
Give reasons for the following:
Iron displaces copper from a solution of a copper salt. The reaction is deemed as a redox reaction.
Give reasons for the following:
A non-metallic atom (at. no. 9) forms a molecule of the same, containing a single covalent bond.
With reference to a molecule of water, fill in the blanks with the correct word. [at. no. of H = 1, O = 8]
Water is a …………… [non-polar/polar] covalent molecule in which the atom of …………… [hydrogen/oxygen] attracts electrons more strongly towards itself. The water molecule shows the presence of …………… [double / one single / two single] covalent bond/s and …………… [one/two] lone pair of electrons present in the …………… [hydrogen/oxygen] atom.
Complete the table given below:
Element Element Type of bond likely in molecule of Formula of compound A: At. no. = 20 B: At no. = 8 A and B A: At no. = 20 C: At no. = 17 A and C D: At. no. = 9 D: At. no. = 9 D and D E: At. no. = 12 F: At. no. = 16 E and F G: At. no. = 1 F: At. no. = 16 G and F