The number of neutrons in an atom with atomic number 17 and mass number 35 is: MCQ with Answer and Explanation

Explanation:
Combined gas law: P₁V₁/T₁ = P₂V₂/T₂. Given P₂ = 2P₁, T₂ = 2T₁. So V₂ = V₁ × (P₁/P₂) × (T₂/T₁) = 22.4 × (1/2) × (2/1) = 22.4 L. Pressure increase tries to halve volume, temperature increase tries to double volume; they cancel out. So volume remains unchanged. This assumes ideal behavior.

Explanation:
An amalgam is an alloy of mercury with another metal. For example, sodium amalgam is used as a reducing agent; dental amalgam contains mercury, silver, tin, and copper. Bronze is Cu+Sn, brass is Cu+Zn, solder is Pb+Sn.

Explanation:
Ionization energy decreases down a group because atomic size increases, and the outermost electron is farther from the nucleus with increased shielding, making it easier to remove. Atomic radius increases, metallic character increases, and number of shells increases down a group.