Table of Contents
How do group 1 elements follow the octet rule?
The alkali metals have only one electron in their outermost energy level. The Octet Rule says that elements lose, gain, or share electrons to form the required octet in their highest remaining energy level. Chemical Properties. The alkali metals are the most reactive of all of the metals.
What are the two exceptions to the octet rule?
However, there are three general exceptions to the octet rule: Molecules, such as NO, with an odd number of electrons; Molecules in which one or more atoms possess more than eight electrons, such as SF6; and. Molecules such as BCl3, in which one or more atoms possess less than eight electrons.
Does Group 1 have 2 valence electrons?
An atom with a closed shell of valence electrons (corresponding to an electron configuration s2p6) tends to be chemically inert….The number of valence electrons.
| Periodic table group | Valence Electrons |
|---|---|
| Group 1 (I) (alkali metals) | 1 |
| Group 2 (II) (alkaline earth metals) | 2 |
What is octet rule with example?
In chemistry, the octet rule explains how atoms of different elements combine to form molecules. In a chemical formula, the octet rule strongly governs the number of atoms for each element in a molecule; for example, calcium fluoride is CaF2 because two fluorine atoms and one calcium satisfy the rule.
How do atoms follow octet rule?
There are two ways in which atoms can satisfy the octet rule. One way is by sharing their valence electrons with other atoms. The second way is by transferring valence electrons from one atom to another. Atoms of nonmetals tend to gain electrons in order to fill their outermost principal energy level with an octet.
What are limitations of octet rule?
One limitation of the octet rule is that it cannot be applied to the nonmetals after silicon in the Periodic Table. These elements can “expand their octet” and have more than eight valence electrons around the central atom. In some molecules the central atom cannot possibly have eight valence electrons.
What is Group 1 on the periodic table called?
The alkali metals are six chemical elements in Group 1, the leftmost column in the periodic table. They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).