Answer. 4s
Ca = Calcium Atomic number is 20, that means it has 20 proton and 20 electron.
1s2,2s2,2p6,3s2,3p6,and 4s2, total of 20 electrons, therefore Highest occupied energy level of Ca is 4s
The next highest energy atomic sublevel after 4p is the 5s sublevel. In the electron configuration of an atom, energy levels increase with increasing principal quantum number (n), so the 5s sublevel is higher in energy than the 4p sublevel.
One electron occupies the highest energy sublevel of alkali metals. Alkali metals have one electron in their outermost energy level, making them highly reactive.
The highest occupied energy level of Beryllium is the second energy level, denoted as 2.
In its ground state, an atom of strontium has the electron configuration of [Kr] 5s². The highest energy level is n=5, which corresponds to the outermost electrons in the 5s subshell. Thus, the highest energy level in a ground state strontium atom is 5.
Aluminum has 3 electrons in its highest occupied energy level.
Sr has two electrons in the highest occupied energy level
There are 2 electrons in the highest occupied energy level of a neutral strontium atom, as the electron configuration of strontium is [Kr]5s^2.
The next highest energy atomic sublevel after 4p is the 5s sublevel. In the electron configuration of an atom, energy levels increase with increasing principal quantum number (n), so the 5s sublevel is higher in energy than the 4p sublevel.
The valence electron shell of noble gases is full.
The energy sublevel being filled by the elements Rb (rubidium) to Sr (strontium) is the 5s sublevel. These elements are in the fifth period of the periodic table, and in period 5, the s sublevel starts to fill up with electrons.
There are 5 electrons in the highest occupied energy level of a nitrogen atom, since nitrogen has an electron configuration of 1s2 2s2 2p3. The 2p sublevel can hold a maximum of 6 electrons, but nitrogen only has 3 in its 2p sublevel.
One electron occupies the highest energy sublevel of alkali metals. Alkali metals have one electron in their outermost energy level, making them highly reactive.
The highest occupied energy level of Beryllium is the second energy level, denoted as 2.
In its ground state, an atom of strontium has the electron configuration of [Kr] 5s². The highest energy level is n=5, which corresponds to the outermost electrons in the 5s subshell. Thus, the highest energy level in a ground state strontium atom is 5.
The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.
Phosphorus has 5 electrons in its highest occupied energy level.
Aluminum has 3 electrons in its highest occupied energy level.