Wiki User
∙ 12y agoCa has 2 electrons in its outermost shell its configuration being 2, 8,8,2 or
1s2, 2s2, 2p6, 3s2 3p6, 4s2
(4s2 fills before 3d becuase of the aufbau principle)
He has also got two electrons these fill the first energy level resulting in a stable arrangement.
1s2
Wiki User
∙ 12y agoThere are 2 electrons in the outer shell of a helium (He) atom. For calcium (Ca), there are 2 electrons in the first shell and 8 electrons in the second shell, so the outer shell has 2 electrons.
In general, atoms need 8 valence electrons to achieve a full outer shell (except for hydrogen and helium, which need only 2). This is known as the octet rule. Atoms can achieve a full outer shell by gaining, losing, or sharing electrons through bonding.
The Octet Rule states that atoms are most stable when they have 8 electrons in their outer shell, except for hydrogen and helium, which are stable with 2 electrons in their outer shell.
Atoms typically like to have a full outer shell, which often means having 8 electrons (an octet) for stability. This is known as the octet rule. However, there are exceptions for smaller atoms like hydrogen and helium, which can be stable with fewer electrons in their outer shell.
Nitrogen has 5 electrons in its outer shell, while bromine has 7 electrons in its outer shell.
Boron has three electrons in its outer shell
there are four electrons on the outer shell of carbon..
Only two electrons.
There is a total of 8 electrons that are needed to fill outer shell of most atoms. An atom is the smallest unit of matter.
8
Each element has shells of electrons and they are limited to how many can be shared in the outer shell. This lets us know what and how many atoms can combine with it. Hydrogen has the need for one electron in its outer shell. Oxygen has the need for two more electrons in its outer shell. Therefore, 2 hydrogen atoms can combine with oxygen.
The Octet Rule states that atoms are most stable when they have 8 electrons in their outer shell, except for hydrogen and helium, which are stable with 2 electrons in their outer shell.
In general, atoms need 8 valence electrons to achieve a full outer shell (except for hydrogen and helium, which need only 2). This is known as the octet rule. Atoms can achieve a full outer shell by gaining, losing, or sharing electrons through bonding.
Atoms typically like to have a full outer shell, which often means having 8 electrons (an octet) for stability. This is known as the octet rule. However, there are exceptions for smaller atoms like hydrogen and helium, which can be stable with fewer electrons in their outer shell.
Nitrogen has 5 electrons in its outer shell, while bromine has 7 electrons in its outer shell.
Boron has three electrons in its outer shell
Vanadium typically has 5 electrons in its outer shell.
Atoms do not actually have desires as such, although the metaphor can be useful. Atoms are more stable when they have a full outer electron shell. The smaller atoms, hydrogen, helium, lithium, and beryllium, can obtain a full outer shell with only two electrons in it. The heavier atoms require 8 electrons to have a full outer shell. That is known as the octet rule (an octet is a set of eight).