2-8-1
This atom would be lithium (Li). It has 3 electrons, with 2 electrons in the first energy level and 1 electron in the third energy level.
In the ground state, a sodium atom has 1 electron in the 3rd energy level, in the 3s orbital. See the link below to see/print a periodic table that gives electron configurations for the elements.
An electrically neutral sodium atom has 11 electrons. These electrons occupy different energy levels or shells around the nucleus. Sodium has 3 electron shells or levels: the first energy level can hold up to 2 electrons, the second energy level up to 8 electrons, and the third energy level up to 1 electron.
A neutral sodium atom has 11 electrons. In its outer energy level, it has 1 electron. Sodium's electron configuration is 2-8-1.
A boron atom has three electrons in its second energy level.
This atom would be lithium (Li). It has 3 electrons, with 2 electrons in the first energy level and 1 electron in the third energy level.
In the ground state, a sodium atom has 1 electron in the 3rd energy level, in the 3s orbital. See the link below to see/print a periodic table that gives electron configurations for the elements.
An electrically neutral sodium atom has 11 electrons. These electrons occupy different energy levels or shells around the nucleus. Sodium has 3 electron shells or levels: the first energy level can hold up to 2 electrons, the second energy level up to 8 electrons, and the third energy level up to 1 electron.
A sodium atom has an atomic number of 11, meaning it has 11 electrons. The first orbit, or energy level, can hold a maximum of 2 electrons. Therefore, in a sodium atom, the first orbit contains 2 electrons.
A neutral sodium atom has 11 electrons. In its outer energy level, it has 1 electron. Sodium's electron configuration is 2-8-1.
A boron atom has three electrons in its second energy level.
Each energy level can hold different number of electrons. The first energy level holds 2, second holds 8, and third holds 8. Because the first two energy levels of sodium can only hold 10 electrons, the sodium has a third energy level to hold the 11th electron.
An atom with seven electrons will have five electrons in the second energy level.
An argon atom has 2 electrons in its first energy level, 8 electrons in its second energy level, and 8 electrons in its third energy level.
Electrons in the outermost energy level (valence electrons) have the highest energy level. These electrons are involved in the atom's chemical reactions and bonding with other atoms.
There's only one. Because of this it is very easy for sodium to lose that one electron so that it can have a full electron shell like that of neon. Sodium's first shell has two electrons, and it's second shell has 8 electrons.
The atomic structure of a sodium atom (Na) consists of 11 protons and 12 neutrons in its nucleus, which is located at the center of the atom. Surrounding the nucleus are three energy levels (or shells) where electrons are located: the first energy level holds 2 electrons, the second holds 8 electrons, and the third holds 1 electron, giving sodium its characteristic reactivity. This single electron in the outermost shell makes sodium a highly reactive alkali metal.