What does Horizontal and Vertical Arrangement have to do something with the Periodic Table...?

Question

My teacher said theres something that made it arranged like that

Answer 1

It's vertically arranged according to the number of shells (and subshells) in the electron configuration, and horizontally arranged by the number of electrons in the outermost (valence) shell.

HTH ☺

Doug

Answer 2

Elements with similar properties fall into similar groups (vertical columns). Elements in the group also have similar valence shell configurations.

Elements in a period have trends in atomic radius and ionization potential. Quite interestingly, but very easy to prove using a simple equation in quantum mechanics that is actually taught to high school chemistry students, as you move down the row starting on the very left, the atomic radius decreases due to the fact that the valence electrons are on the same shell in each period. And as you move to the right, you add more electrons on that shell which causes the force between the nucleus and that valence shell to increase which brings in the shell, hence making the atom smaller.

Answer 3

It's vertically arranged according to the number of shells and sub shells in the electron configuration, and horizontally arranged by the number of electrons in the outermost valence shell.and also the type of metals and their electronic configuration and the electronic number, affinity.

Answer 4

A HORIZONTAL ARRANGEMENT IS A GROUP OF ELEMENTS AND A VERTICAL ARRANGEMENT IS A FAMILY OF ELEMENTS!!!!

Answer 5

yes.

All atoms with the same valences is categorized in vertical.

Answer 6

idk but thats a good question