the number of protons
The number of protons in the nucleus of an atom distinguishes it from another atom. This number is known as the atomic number and determines the element to which the atom belongs.
atomic number of an atom is its own characteristic property,ie.the number of protons or electrons in an atom,which distinguishes atoms from one another
The number of protons in the atomic nuclei.
An element's atomic number, or number of protons, differentiates one element from another.
When an atom of one element is brought in contact with an atom of another element, electrons get transferred from one element to another. However, if the atoms of same element come together then electrons are shared and not transferred. Exception to this is elements in noble gases.
The particle responsible for determining the identity of an element is the proton. The number of protons in an atom's nucleus, known as the atomic number, uniquely identifies the element. For example, hydrogen has one proton, while carbon has six. This atomic number distinguishes one element from another in the periodic table.
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It is the number of protons in the nucleus of an atom. It defines what element the atom is.
The number of protons in an atom determines the identity of the element.See these two related questions for more information:[http://wiki.answers.com/Q/What_is_the_atomic_number_and_what_does_it_tell_you_about_the_number_of_protons_in_an_atomWhat is the atomic number and what does it tell you about the number of protons in an atom?]and[http://wiki.answers.com/Q/How_do_you_find_the_number_of_protons_and_electrons_and_neutrons_in_an_atomHow do you find the number of protons and electrons and neutrons in an atom?]
An element is made up of only one type of atom, such as hydrogen (H) or oxygen (O). Each element has a unique number of protons in its nucleus, which distinguishes it from other elements on the periodic table.
A pure substance made of only one type of atom is an element.An element, or elementary substance.An element.
The feature that identifies an atom as a specific element is the number of protons in its nucleus, known as the atomic number. Each element has a unique atomic number, which determines its chemical properties and its place in the periodic table. For example, hydrogen has one proton (atomic number 1), while carbon has six protons (atomic number 6). Thus, the atomic number is the defining characteristic that distinguishes one element from another.