The red arrow is pointing to first energy level. On the periodic table, what is related to this level? 1st period (row) atomic number 1st group (column) atomic mass

The red arrow pointing to the outermost circle in the image, which is described as the "first energy level," is likely referring to the simplest model of an atom where the first energy level corresponds to the innermost shell that electrons occupy.Now, let's relate this to the periodic table:1. 1st period (row): The first period of the periodic table corresponds to the elements that have their electrons in the first energy level. This includes hydrogen and helium.2. Atomic number: The atomic number of an element is the number of protons in the nucleus of an atom, which also equals the number of electrons in a neutral atom. The atomic number determines the element's position in the periodic table but is not specifically related to the energy levels.3. 1st group (column): The first group in the periodic table is the column of elements known as the alkali metals, which include lithium, sodium, potassium, etc. These elements have a single electron in their outermost energy level, but this is not the first energy level.4. Atomic mass: The atomic mass of an element is the mass of an atom, typically measured in atomic mass units (u). It is roughly equivalent to the number of protons and neutrons in the atom's nucleus. Atomic mass is not directly related to the energy levels of electrons.Step and Answer:The correct relation to the first energy level in the context of the periodic table is the 1st period (row). This is because the elements in the first period have their electrons in the first energy level.Final Answer: 1st period (row)