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It is represented by the Table of Elements

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Ordinary matter is made up of protons, neutrons, and electrons and is composed of atoms. An atom consists of a tiny nucleus made up of protons and neutrons, on the order of 20,000 times smaller than the size of the atom. The outer part of the atom consists of a number of electrons equal to the number of protons, making the normal atom electrically neutral.

A chemical element consists of those atoms with a specific number of protons in the nucleus; this number is called the atomic number. The atoms of an element may differ in the number of neutrons; atoms with different neutron numbers are said to be different isotopes of the element.

Elements are represented by a chemical symbol, with the atomic number and mass number sometimes affixed as indicated below. The mass number is the sum of the numbers of neutrons and protons in the nucleus.

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Related Questions

What are letters used to represent an atom?

A symbol.


What does an atomic number represent in an atom?

the elementprotons in the nucleuselectrons in the electron cloud of a neutral atom


In Thomas plum pudding model of the atom the plugs represent?

The plugs represent the electrons.


What does the number of protons represent?

positive charge in the atom


In Thomson and plum-pudding model of the atom the plums represent?

The plums represent negative electrons


What does atomic mass represent of an element represent?

Atomic Mass represents the mass of atom. We use mass of protons and neutrons.


In a model of an atom what would this symbol represent?

You think probable to the chemical symbol of an element.


Is it true that an atom is made up of two or more chemicals?

No, an atom may only represent one element. It is pure.


How do the circles represent the different parts of an atom?

They don't, unless you mean the smaller ones on the larger ones. The larger, uncoloured circles represent the orbital paths of the electrons of the atoms. The smaller, coloured circles represent the different parts of the atom, like the protons, neutrons, and electrons.


Why is bigger circle used to represent an atom of uranium?

because it has more electrons


What is implied when there no subscript on a element?

When there is no subscript on an element, it is implied that one atom of that element is present. For example, "H" would represent one atom of hydrogen.


What is He2s1?

He2s1 is a chemical notation for a helium atom that has one electron in the 2s subshell. This notation is commonly used to represent the electron configuration of an atom.