Question

what is atom explain and molecules​

Answer 1

Answer:

Atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.

Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.

Answer 2

Answer:

atom:-

an atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across. They are so small that accurately predicting their behavior using classical physics—as if they were billiard balls, for example—is not possible due to quantum effects.

more info:-

Properties:-

• Mass range

1.67×10−27 to 4.52×10−25 kg

• Electric charge

zero (neutral), or ion charge

• Diameter range

62 pm (He) to 520 pm (Cs) (data page)

• Components

Electrons and a compact nucleus of protons and neutrons

molecules:-

Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.