What do you understand by valency, calculate the valency of Na, Mg ,Ca ,Li ?
Answers
Magnesium- K- 2 , L- 8 , M - 2 ( Atomic No. 12)
Calcium- K -2 , L-8, M- 8 , N - 2 ( Atomic No. 20 )
Li - K -2, L -1 ( Atomic No. 3)
Answer:
Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.
The electronic configuration of sodium can be written as 2, 8, 1. 2, 8, 1 electrons are distributed in the shells K, L, M respectively. Therefore, valence electron in sodium is 1 and it needs to lose 1 electron from the outermost orbit to attain octet. Hence, the valency of sodium is 1.
The electronic configuration of sodium can be written as 2, 8, 1. 2, 8, 1 electrons are distributed in the shells K, L, M respectively. Therefore, valence electron in sodium is 1 and it needs to lose 1 electron from the outermost orbit to attain octet. Hence, the valency of sodium is 1.Magnesium has valency equal to 2^+ because the electronic configuration of Mg is [2,8,2]. The nearest noble gas to magnesium is neon with electronic configuration of [2,8], to achieve this stable electronic configuration Mg can lose 2 valence electrons, hence its valency is 2^+ .
The electronic configuration of sodium can be written as 2, 8, 1. 2, 8, 1 electrons are distributed in the shells K, L, M respectively. Therefore, valence electron in sodium is 1 and it needs to lose 1 electron from the outermost orbit to attain octet. Hence, the valency of sodium is 1.Magnesium has valency equal to 2^+ because the electronic configuration of Mg is [2,8,2]. The nearest noble gas to magnesium is neon with electronic configuration of [2,8], to achieve this stable electronic configuration Mg can lose 2 valence electrons, hence its valency is 2^+ . If in the valence shell, the number of valence electrons is <= 3, the atom is of a metal. The valency of a metal is the number of its valence electrons. Thus the valency of calcium is 2 since it has 2 valence electrons. 2.
The electronic configuration of sodium can be written as 2, 8, 1. 2, 8, 1 electrons are distributed in the shells K, L, M respectively. Therefore, valence electron in sodium is 1 and it needs to lose 1 electron from the outermost orbit to attain octet. Hence, the valency of sodium is 1.Magnesium has valency equal to 2^+ because the electronic configuration of Mg is [2,8,2]. The nearest noble gas to magnesium is neon with electronic configuration of [2,8], to achieve this stable electronic configuration Mg can lose 2 valence electrons, hence its valency is 2^+ . If in the valence shell, the number of valence electrons is <= 3, the atom is of a metal. The valency of a metal is the number of its valence electrons. Thus the valency of calcium is 2 since it has 2 valence electrons. 2.Valency of Lithium – Atomic number of lithium is 3. Its electronic configuration is 2,1. So, it needs to lose one electron to attain stability and get electronic configuration like noble gas Helium. Thus, its valency is 1.