Atomic number. should be 120.
due to.... a/q
Alkaline earth metals are part of the eighth group and are known to exist in two groups.
Consequently, the element's atomic number will be 120.
The quantity of protons in an atom's nucleus is known as the atomic number. An element's identity is determined by its proton count (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
A chemical element's atomic number is its position in the periodic system, which places the elements in ascending order of the number of protons in their nuclei. As a result, the atomic number is also determined by the number of protons, which is always equal to the number of electrons in a neutral atom.
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