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An element is a pure substance that consists entirely of one type of atom. An atom is the smallest amount of a particular element that can be identified as that element.


All atoms of the same element have the same number of protons in the nucleus and consequently have the same atomic number. All atoms of the same neutral element have the same number of electrons as well.


The atomic number represents the number of protons present in the nucleus of an atom. The atomic number of an element is located on the upper-left corner of that element in the periodic table.


In order to find the atomic number of any element, students can use a periodic table and look at the upper left-hand corner of a specific element. The atomic number is also the number of protons found in the nucleus of an element. For example, magnesium has 12 protons, so this is also its atomic num


The smallest atom in the periodic table in terms of mass is hydrogen, which has only one proton and one electron. Hydrogen has no neutrons. The element has an atomic number of 1 and atomic weight of 1.00794, making it the smallest of all the elements.


Atoms and elements are related in that elements consist of one specific kind of atom. This means that the atom is the base unit of an element. Atoms consists of a nucleus, which contains protons, neutrons and electrons that orbit around the nucleus.


An element is a description of a type of atom, so a single atom is representative of an element but not an element itself. "An atom" refers to a physical entity; "an element" refers to a type of atom.


Atomic mass of an element is the average weight of the components that make up an atom. An atom is composed of protons, neutrons and electrons.


The atomic mass of an element is determined by the number of subatomic particles in the nucleus. The subatomic particles contained within a nucleus are called protons and neutrons.


Atoms of the same element that have different masses are called isotopes. Different masses result when there are different numbers of neutrons. All atoms of a particular element have the same number of protons.