what is atom??
what is mass
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Atom:
- An atom is the smallest unit of ordinary matter that forms a chemical element. Every solids, 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 predict their behavior using classical physics- as if they were tennis balls.
- For example- is not possible due to quantum effects.
- Most of the atom is empty space. The rest consists of a positively charged nucleus of protons, neutrons surrounded by a cloud of negatively charged electrons.
- The nucleus is small and dense compared with the electrons, which are the lightest charged particles in nature.
Mass:
- Mass is both a property of the physical body and a measure of its resistance to acceleration when a net force is applied.
- An object's mass also determines the strength of its gravitational attraction to other bodies. The SI unit of mass is the kilogram.
- An object on the Moon would be weightless than it does on earth because of the lower gravity, but it would still have the same mass.
- This is because weight is a force, while mass is the property that determines the strength of this force.
- In physics there are different ways of determining the quality of mass. Two of the most commonly used are inertial mass and gravitational mass.
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