Atomic Structure and Periodic Table 2022

Electronegativity is how good an atom is at attracting electrons.

Al has the lesser electronegativity compared to Cl.

The full electron configuration for Ca2+ is 1s2 2s2 3s2 3p6.

Mendeleev's periodic table was unique because it predicted undiscovered elements.

The element with this electron configuration is Phosphorus (P).

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

The Periodic Table organizes elements based on their atomic number, electron configurations, and recurring chemical properties.

Noble gases are a group of elements in Group 18 of the periodic table that are characterized by their lack of reactivity due to having a full valence shell.

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net electrical charge.

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.