particle that can be drawn closer to accupy smaller valume?

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air inside the syringe

The particle that can be drawn closer to occupy smaller volume is the electron. In an atom, electrons are negatively charged particles that orbit around the positively charged nucleus. Electrons have a very small mass compared to protons and neutrons, and they are considered point-like particles, meaning that they have no known internal structure.

The reason electrons can occupy smaller volumes is due to their wave-like nature described by quantum mechanics. According to the Heisenberg uncertainty principle, the more precisely the position of a particle is known, the less precisely its momentum can be known, and vice versa. This principle implies that the position and momentum of an electron cannot be measured simultaneously with arbitrary precision.

In an atomic orbital, which describes the spatial distribution of an electron around the nucleus, the electron is described as a probability cloud rather than having a fixed position. These orbitals have different shapes and sizes, and each one can be thought of as a region in space where an electron is likely to be found.

When an electron occupies a smaller volume, it means that there is a higher chance of finding the electron in that region of space. This can occur when the electron is in a higher energy level or when it is in a more tightly bound orbital closer to the nucleus.

In summary, the electron is a particle that can be drawn closer to occupy smaller volumes due to its wave-like properties described by the principles of quantum mechanics.