Let us see why the atom of mg unites with two Cl atoms, while that of Na takes but one.
"An Introduction to Chemical Science"
R.P. Williams
The element mg, however, has two such bonds, as mg or -mg-.
"An Introduction to Chemical Science"
R.P. Williams
mg would withdraw Zn from a similar solution, and be in its turn withdrawn by Na.
"An Introduction to Chemical Science"
R.P. Williams