Molecule | MCQs

Explanation

• An atom is the smallest particle of an element that retains the properties of that element.
• It is the smallest unit of a chemical element, and it cannot be broken down into smaller particles.

Explanation

The smallest particle of a compound is called a molecule.

Molecules are formed when atoms of the same or different elements combine. 

while

The matter is made up of the smallest particles called atoms

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ND20.1.2023

Explanation

The carboxylate end of a soap molecule (-COO-) is hydrophilic (water-loving), meaning it is attracted to water.

This end of the molecule is negatively charged and is able to form hydrogen bonds with water molecules, which are polar and also have a slightly positive charge.

Explanation

A compound is a pure substance that contains only one type of molecule made up of atoms of more than one element.

Examples of compounds:

• Water (H2O) - Compound of Hydrogen and Oxygen
• Common salt (NaCl) - Compound of Sodium and Chlorine
• Washing soda (Na2CO3) - Compound of Sodium, Carbon, and Oxygen
• Carbon dioxide (CO2) - Compound of Carbon and Oxygen
  
• Sugar (C6H12O6) - Compound of Carbon, Hydrogen, and Oxygen

Explanation

• An atom is the smallest possible particle of an element that can combine to form new compounds.
• Atoms are the building blocks of matter, and they cannot be broken down into smaller particles.