Exercise 1 | Structure and Bonding in Organic Molecules
Chlorine (Z=17) exists in two naturally occuring isotopes.
The most abundant (75.77%) has 18 neutrons and the other 20
- Use the XZA formalism to describe both isotopes.
- What is the electronic configuration of chlorine?
Magnesium has an electronic configuration of 1s2 2s2 2p6 3s2
- What is the most stable ion of magnesium?
- What is the simplest neutral compound which can be formed from magnesium and chlorine?
- Cl1735 and Cl1737
- Z = 11 ⇒ 17 electrons ⇒ 1s22s23s23p5
- Nearest noble gas is Ne (1s22s22p6)
Mg needs to lose 2 electrons to get Ne’s configuration
The most stable ion of magnesium is Mg2+
- Mg’s most stable ion is Mg2+ and Cl’s most stable ion is Cl-
For electroneutrality we need two Cl- for one Mg2+ ⇒ MgCI2