# Short-Questions

Fast solutions for complex problems

## Are helium and lithium isoelectronic?

Helium and lithium are isoelectronic. This means their electron structure is identical. They both have two electrons in the first shell outside of the nucleus. Lithium has a positive charge so removing electrons is more difficult.

Is Li+ H he isoelectronic?

Be2+ and Li+ are isoelectronic to He, because they lose their 2s electrons.

### What is isoelectronic examples?

Atoms and ions that have the same electron configuration are said to be isoelectronic. Examples of isoelectronic species are N3–, O2–, F–, Ne, Na+, Mg2+, and Al3+ (1s22s22p6). For atoms or ions that are isoelectronic, the number of protons determines the size.

What is aluminum isoelectronic with?

The aluminum atom loses its three valence electrons. The Mg2+ ion, the Al3+ ion, the Na+ ion, and the Ne atom are all isoelectronic. For representative elements under typical conditions, three electrons is the maximum number that will be lost.

## Is H larger than Li+?

The radius of the Coulomb hole for H− is three times greater than for helium (50% greater when r is Z-scaled), and for ZC it is even greater.

What is isoelectronic with K+?

And we can see that the potassium ion, K+, has the same electronic configuration as the chloride ion, Cl-, and the same electronic configuration as an atom of argon, Ar. Therefore, Ar, Cl-, and K+ are said to be isoelectronic species.

### What element is isoelectronic with Li+?

Ionic compounds The Li+ ion contains two electrons, same as the helium atom. Li+ ions are isoelectronic with helium.

What is Isosteres example?

Isosteres are atoms, molecules, or ions of similar size containing the same number of atoms and valence electrons. Example 1. Consider neon, the noble gas at the end of the second row of the periodic table. To the left of it, fluorine has one fewer electron.

## What pairs are isoelectronic?

– Isoelectronic pairs are those pairs of atoms, ions or molecules that have the same number of electrons in them. – For finding the isoelectronic pairs, we can just add the number of electrons of each atom in the species and also the charge of the species (if present).

What charge will an aluminum cation have?

+3
Aluminum cation

PubChem CID 104727
Molecular Weight 26.981538
Dates Modify 2021-09-05 Create 2004-09-16
Description Aluminium(3+) is an aluminium cation that has a charge of +3. It is an aluminium cation, a monoatomic trication and a monoatomic aluminium. ChEBI

### What will an atom of magnesium do to become stable?

Magnesium is under group 2 that also has a valence electron of 2. To achieve stability and to follow the octet rule, these 2 electrons in the outer shell will be removed making this atom into an ion with a 2+ charge.

Why lithium ion is bigger than magnesium ion?

the protons in the nucleus tends to attract the outer electrons towards in side which in turn decreases the size of outer shell and as 2 electrons are present in outer shell in Mg in comparison to 1 electrons in Li. hence the force will be more in case of Mg.

## Which is an isoelectronic species of the noble gas helium?

Helium atom, hydride ion and lithium ion are all isoelectronic species: They all have the same ground-state electronic configuration as the Noble Gas helium: 1s2. Just like helium, hydride ions and lithium ions are considered unreactive.

What are the chemical properties of all isoelectronic species?

Note that isoelectronic species tend to have very similar chemical properties. Helium atom, hydride ion and lithium ion are all isoelectronic species: They all have the same ground-state electronic configuration as the Noble Gas helium: 1s2. Just like helium, hydride ions and lithium ions are considered unreactive.

### How is lithium different from hydrogen and helium?

Lithium has two electrons in a close orbit like helium, but the third is farther out and easily removed. That leaves behind a lithium ion, positively charged because it has only two electrons, and it is smaller than hydrogen. Our three Nobel laureates invented ways of making batteries using lithium, with metal and later with compounds.

Which is the isoelectronic configuration of the chloride ion?

The electronic configuration of the chloride ion, Cl-, is 1s22s22p63s23p6. The electronic configuration of an argon atom in the ground-state is also 1s22s22p63s23p6. We say that that the chloride ion is isoelectronic with the argon atom.