Which salt is formed when hydrochloric acid reacts with sodium hydroxide? MCQ with Answer and Explanation

Explanation:
Across period 3, ionization energy increases from Na to Ar. Chlorine has high ionization energy due to high effective nuclear charge and small atomic radius, though Argon is highest. Among these, Cl has highest IE.

Explanation:
Metallurgy is the science and technology of extracting metals from their ores, purifying them, and preparing them for use. It involves various steps like concentration, reduction, and refining. Mineralogy is the study of minerals, and geology is the study of the Earth's physical structure.

Explanation:
Atomic number (Z) is the number of protons in the nucleus, which defines the identity of the element. In a neutral atom, the number of electrons equals Z. Neutrons contribute to mass number but not atomic number. Isotopes have same Z but different number of neutrons. Nucleons are total protons + neutrons = mass number. The modern periodic table is based on atomic number.