The Richter magnitude scale (often shortened to Richter scale) was developed to assign a single number to quantify the energy that is released during an earthquake. An earthquake (also known as a quake, tremor or temblor) is the result of a sudden release of energy in the Earth’s crust that creates seismic waves.

All of the following are peroxidases.

(A) Vitamin E

(B) Selenium

The yellow color of human urine is primarily due to a pigment called urochrome. Urochrome is a waste product resulting from the breakdown of hemoglobin, a protein in red blood cells. The varying shades of yellow in urine can be influenced by factors such as hydration levels, diet, and certain medications, but urochrome is the main pigment responsible for the typical yellow color of urine.

Metals are electropositive elements because they tend to lose electrons easily. In chemical reactions, metals readily give away their outer electrons to form positive ions, making them good conductors of electricity and heat. This electron loss leads to the formation of cations, which contribute to the electropositive nature of metals.