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www.reference.com/article/element-smallest-atom-periodic-table-fa748f5add771b1c

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.

www.reference.com/article/atomic-number-atom-1fa7fe1ceadf112a

An atomic number represents the amount of protons that an element consists of in its nucleus. It is the identifying number that is unique to one atom of the specific element.

www.reference.com/article/meaning-atomic-number-faa627a011fe26e8

The atomic number is the value given to the number of protons in the nucleus of an atom. This value is the same as the charge value of an atom.

www.reference.com/article/period-periodic-table-d136127780fc2b7f

A period on the periodic table is a horizontal grouping of elements running from the left to right of the table. Several trends are observed going from the left side of the periodic table to the right.

www.reference.com/article/co-periodic-table-514e7e8b0c60e232

Co in the periodic table of elements is cobalt. Located in group nine, period four of the periodic table, this transition metal has an atomic number of 27 and an atomic weight of 58.9. It is a hard element that appears bluish-gray in color.

www.reference.com/science/periodic-table-tell-f8b64e8288be64b

The Periodic Table offers basic information about each one of the known chemical elements. Each element has its own box in the table, and these boxes include the element's atomic number, atomic weight and chemical symbol. An element's position on the table indicates which elements share its basic pr

www.reference.com/article/information-provided-atomic-number-80b0b6d1f54f0872

The atomic number indicates the number of protons present in the nucleus of an atom, which is used to uniquely identify the atom, as well as its chemical properties. The atomic number is denoted by the universal symbol "Z."

www.reference.com/article/periodic-table-work-851db90f4f2f8be1

The periodic table classifies chemical elements by their similarities and properties. Each square in the periodic table shows an element's atomic number, its symbol, its name and its atomic weight, which is the number of protons and neutrons the element has.

www.reference.com/science/periodic-table-called-periodic-table-9dc9c642be8cf361

The periodic table's name comes from the fact that it arranges the elements into repeating sets, otherwise known as "periods." These periods are defined by the covalence of an element, the number of electrons it has in its outermost shell and by other elemental attributes. This arrangement places el

www.reference.com/article/did-periodic-table-its-name-e4d608ae7ff948f4

The periodic table got its name from the way the elements are arranged in rows, which are called periods. The columns of the table are called groups, some of which have specific names, such as the noble gases and the halogens.