A molecular compound is usually composed of two or more nonmetal elements. Molecular compounds are named with the first element first and then the second element by using the stem of the element name plus the suffix -ide. Numerical prefixes are used to specify the number of atoms in a molecule.

The charge numbers for ions (and also subatomic particles) are written in superscript, e.g. Na+ is a sodium ion with charge number positive one (an electric charge of one elementary charge).

A positively charged ion is known as cation. A cation is formed by the loss of one or more electrons by an atom. The ions of all the metal elements are cations. A negatively charged ion is known as anion….More videos on YouTube.

The best way to distinguish between these two compounds is to use Mössbauer spectroscopy.

α-Fe2O3 has the rhombohedral, corundum (α-Al2O3) structure and is the most common form. It occurs naturally as the mineralhematite which is mined as the main ore of iron. It is antiferromagnetic below ~260 K (Morin transition temperature), and exhibits weak ferromagnetism between 260 K and the Néel temperature, 950 K.

Fe

3History. The name derives from the Anglo-Saxon iron of unknown origin. The element has been known from prehistoric times. The symbol Fe is derived from the Latin ferrum for “firmness”.

5 valence electrons

15 electrons

five electrons

Simple answer: hybridization. Phosphorus only ‘needs’ three more electrons to get a full valence shell of eight, but you’ll notice that it actually has five valence electrons, so in theory all of these could bond. When bonding five times, the s-, p-, and d-orbitals actually fuse to create a hybrid dsp 3 orbital.

three unpaired electrons

The ground state electron configuration of a phosphorous atom has three unpaired electrons. They’re in the 3p sublevel.

1 unpaired electron

2

Answer and Explanation: Sulfur has two unpaired electrons in the 3p subshell. The p subshell can accommodate a maximum of 6 electrons, but here it holds 4 electrons, which means that sulfur has 2 unpaired electrons, both located in the p-subshell.

Re: Unpaired Electron According to Hund’s rule, due to electron repulsion, electron in same subshell will occupy different orbitals with parallel spin, which means in the 3P orbital, it is going to be 2 electrons filled up without having any pairs.

3 unpaired electrons

two unpaired electrons

one unpaired electron

The ions with the largest number of unpaired electrons are Gd3+ and Cm3+ with seven unpaired electrons.

4 pairs

1 Answer. In the ground state of magnesium, none of the valence electrons are unpaired.

Mg has paramagnetic property, in spite of not having single electron in its configuration and gold shows diamagnetic property in spite of having single electron in its S orbital.

The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max.

6 electrons

Look again at Figure 5.8 and note that the 4f sublevel is filled after the 6s sublevel and before the 5d sublevel. We will need 14 boxes to contain the electrons needed to fill the seven f orbitals….

2 electrons

Maximum number of orbitals in an energy level (n2)