GENERAL KNOWLEDGE

Detailed explanation-1: -In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).

Detailed explanation-2: -Trend-wise, as one moves from left to right across a period in the modern periodic table, the ionization energy increases as the nuclear charge increases and the atomic size decreases. The decrease in the atomic size results in a more potent force of attraction between the electrons and the nucleus.

Detailed explanation-3: -The periodic law states: “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties."

Detailed explanation-4: -Periodic Table of Chemical Elements. The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number.