atomic number- the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element number- a concept of quantity involving zero and units; "every number has a unique position in the sequ...
atomic number noun 语法 (chemistry) The number, equal to the number of protons in an atom that determines its chemical properties. Symbol: Z [..] + 加 英文-中文字典 原子序 noun number of protons [..] The atomic number for iron is 26. 鐵的原子序數是二十六。 en.wiktionary.org ...
The atomic number is specific for each element. is the same for all atoms of an element. is equal to the number of protons in an atom. appears above the symbol of an element in the periodic table. 11 Na Atomic Number Symbol Atomic Number and Protons דוגמאות Atomic N...
Symbol:Z. The number of protons in the nucleus of an atom. This is equal to the number of electrons orbiting the nucleus in a neutral atom. Theisotopesof an element have the same atomic number but differentmass numbers. Collins Dictionary of Astronomy © Market House Books Ltd, 2006 ...
Atomic number is important because it is the number of protons in an atom. The atomic number defines the element and all atoms of the same element... See full answer below.Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our expert...
In the 1930s, uranium was the heaviest element known. It was the last element in the periodic table. But a "neutron change" like the ones described above would produce an element with atomic number 93. No one had ever heard of an element with atomic number 93! In 1940, a pair of ...
Isotopes are two or more forms of an element. Isotopes differ from each other according to their mass number. The number written to the right of the element's name is the mass number. The mass number represents the number of protons plus neutrons in the nucleus of an atom of the element...
neutrons are found in the nucleus of the atom, while the electrons are outside the nucleus. The atomic number is the number of protons, while the mass number is the number of protons and neutrons. If an element is not charged, the number of electrons will equal the number of protons. ...
Uranium is a chemical element with symbol U and atomic number 92. L'uranio (dal greco "cielo") è l'elemento chimico di numero atomico 92. ParaCrawl Corpus The natural order of elements is based on the number of protons in the nucleus of their atoms, starting with element number 1,...
The number written to the right of the element's name is the mass number. The mass number represents the number of protons plus neutrons in the nucleus of an atom of the element. The number of protons determines the element, but the number of neutrons in the atom of any one element ...