The outermost orbital shell of an atom is called its valence shell, and the electrons in the valence shell are valence electrons. Valence electrons are the highest energy electrons in an atom and are therefore the most reactive.

## What is the valence shell electron configuration?

The outermost orbital shell of an atom is called its valence shell, and the electrons in the valence shell are valence electrons. Valence electrons are the highest energy electrons in an atom and are therefore the most reactive.

## Can you calculate valence electrons?

The number of valence electrons for molecules can be calculated by adding the valence electrons of all the atoms that form that respective molecule. 2⋅1+1⋅6=8 valence electroncs.

Is valence electron configuration the same as electron configuration?

The number of valence electrons that are present in an atom can be determined from that atom’s electron configuration. Valence electrons are found in the orbitals associated with an atom’s highest occupied energy level.

### How do you write the electron configuration?

When writing an electron configuration, first write the energy level (the period), then the subshell to be filled and the superscript, which is the number of electrons in that subshell. The total number of electrons is the atomic number, Z.

### What is the valence electron configuration of each element in group 2?

Valence Electrons

Periodic table group Valence electrons
Group 1 (I) (alkali metals) 1
Group 2 (II) (alkaline earth metals) 2
Groups 3-12 (transition metals) 2*
Group 13 (III) (boron group) 3

Is valency and valence electrons the same?

Valency is the number of bonds an element or an atom can form. Whereas valence electrons are the electrons that take part in chemical bond formation. The formation of bonds between the atoms are explained by valency. Whereas, the elemental character of an atom is explained by the valence electrons.

## What happens to the number of valence electrons?

The number of valence electrons decreases from left to right across each period. The number of valence electrons increases from top to bottom within each group. All of the elements in group 9 have nine valence electrons. Elements with the most valence electrons are in group 18.

## What is the electron configuration 1s2 2s2 2p6?

2 Answers. BRIAN M. The electron configuration 1s22s22p63s23p2 is the element Silicon.

Is a valence electron the same thing as an electron?

‘Valence’, by its literary meaning in Chemistry, is related to capacity. In chemical terms, the valency of an element is the number of bonds it could form. The valence electrons would be the electrons that are available to take part in this bonding.

### How do you calculate number of valence electrons?

Group 1: 1 valence electron

• Group 2: 2 valence electrons
• Group 13: 3 valence electrons
• Group 14: 4 valence electrons
• Group 15: 5 valence electrons
• Group 16: 6 valence electrons
• Group 17: 7 valence electrons
• Group 18: 8 valence electrons (except for helium,which has 2)
• ### What elements have 8 valence electrons?

Neon QQQQQQQQQBOOL Bonding Atoms tend to be more stable if they have 8 valence electrons. Atoms of neon (Ne), argon (Ar), krypton (Kr), and xenon (Xe) have 8 valence electrons. These elements are nonreactive, or stable.

How to figure valence of electrons in the periodic table?

– By remembering Or estimating the element’s group no. – If you are familiar with that atom then try forming a compound with that atom which will tell you it’s valency (this won’t work in some cases due to variable – Well in worst situation if you are in exam hall then:-