What are the building blocks of matter?

Atoms are the building blocks of matter. The atom is made of many smaller pieces, known as subatomic particles. Every atom contains a central core called the nucleus, made of particles called protons and neutrons. The matter is defined as anything that has mass and takes up space (it has volume). Mass is the amount of matter in an object. The three states of matter are

  • solid,
  • liquid
  • gas.

The particle model represents particles by small, solid spheres. For example water exists as ice, liquid water, and gaseous steam

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