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 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.
A neutral atom of magnesium has 2 electrons in its outermost energy level. Magnesium has a total of 12 electrons, with 2 electrons in the first energy level and 8 electrons in the second energy level. The outermost energy level is the second energy level in the case of magnesium.
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.
A neutral sulfur atom has 6 electrons in its outermost energy level. Sulfur has 16 electrons, with 2 electrons in the first energy level, 8 electrons in the second energy level, and 6 electrons in the third and outermost energy level.