What is the difference between an atom and an element? What are atoms composed of? What...

What is the difference between an atom and an element? What are atoms composed of? What is the significance of atomic number and mass number?

Expert Solution

Atoms are the smallest bits of matter and are composed of particles called protons (which carry a positive electrical charge), neutrons (which carry no electrical charge.ie,neutral) and electrons (which carry a negative electrical charge). The protons and neutrons cluster together in the central part of the atom, called the nucleus, and the electrons 'orbit' the nucleus(means revolve around the nucleus.That path is called orbit). A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons.Atoms can join together to form molecules, which in turn form most of the objects around you
An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron..
The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons.
The periodic table is listed by the atomic number.Atomic number is usually represented by the symbol 'Z' .Actually we can call it as the identity of an element.
Mass number gives the atomic weight of the element.

Mass Numbers = (Number of Protons) + (Number of Neutrons)

It is represented by the symbol A

queen_honey_blossom answered 2 years ago

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