The number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z. The number of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom is determined very nearly by the total number of protons...
展开全部 英英释义 Noun 1. 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 行业词典 化学 原子序数 物理学 原子序数...
Atomic number and mass number：原子数和质量数 AtomsandElements TheAtomAtomicNumberandMass NumberIsotopes LecturePLUSTimberlake 1 AtomicTheory AtomsarebuildingblocksofelementsSimilaratomsineachelementDifferentfromatomsofotherelementsTwoormoredifferentatomsbondin simpleratiostoformcompounds LecturePLUSTimberlake 2 Subat...
The number of protons in an atom equals the number of electrons. This is necessary to balance the charge of an atom, and to increase its stability... See full answer below.Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our exp...
What is the mass number of this isotope? If an element has 80 protons and 200.56 mass number, then the number of neutrons will be ___. The atomic number of nitrogen is 7. What is the mass number of a nitrogen atom with 6 neutrons? Determine the mass number of a beryllium atom wi...
1. The number of protons plus the number of neutrons is the element's ___ 2. An atom or molecule that has lost or gained an electron is called a (n) ___ 3. A(n) ___ describes an atom that has lost one or more electrons is called a (n) ___ Classification ...
The total number of protons and neutrons in the nucleus of an atom. For example, nitrogen has 7 protons and 7 neutrons in its nucleus, giving it a mass number of 14. The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishin...
1 AtomicTheory AtomsarebuildingblocksofelementsSimilaratomsineachelementDifferentfromatomsofotherelementsTwoormoredifferentatomsbondin simpleratiostoformcompounds LecturePLUSTimberlake 2 SubatomicParticles ParticleElectron Symbole- Charge1- RelativeMass 0 Location outsidenucleus Proton p+ + Neutronn...
Atomic number and mass number：原子数和质量数共24页文档 AtomsandElements TheAtomAtomicNumberandMass NumberIsotopes LecturePLUSTimberlake 1 AtomicTheory AtomsarebuildingblocksofelementsSimilaratomsineachelementDifferentfromatomsofotherelementsTwoormoredifferentatomsbondin simpleratiostoformcompounds L...
The modern name of nitrogen was first suggested in 1790 by French chemist Jean Antoine Claude Chaptal (1756-1832). This name made sense to chemists when they realized that the new gas was present in both nitric acid and nitrates. Thus, nitrogen means "nitrate and nitric acid"(nitro-)and ...