A. the number of protons in an atom B. the number of neutrons in an atom C. the number of electrons in an atom D. the total number of particles in an atom 相关知识点: 试题来源: 解析 A。元素的原子序数告诉我们一个原子中的质子数。原子序数等于质子数,选项 B 中子数不能由原子序数确...
The meaning of ATOMIC NUMBER is an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines t
mass number 1.The total number of protons and neutrons (nucleons) in the nucleus of an atom. 2.The number of nucleons (protons and neutrons) in the nucleus of an atom. Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited ...
Stabilizing persistent currents in an atomtronic Josephson junction necklace Josephson junction arrays lead quantum circuitry research, vital for quantum computing, simulation, and metrology. Here the authors show that increasing the number of links in an atomtronic Josephson junction necklace enhances the...
If the atomic mass number is composed of neutron and protons then surely the amu of an atom should be a whole number as neutrons and protons both have a mass of +1. For example, should not sodium have an amu of 23? Why does chlorine have an amu of 35.45?
24.The atomic number of carbon is six.How many electrons(电子)doesone atom of carbon have?A.Two.B.Four.C.Six.D.Twelve.24.The atomic number of carbon is six. How many electrons(电子)does one atom of carbon have? A.Two. B. Four. C.Six. D.Twelve. 相关知识点: 试题来源: 解析...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
In the planetary model of atomic structure, an atom consists of a heavy, positively charged nucleus surrounded by a cloud of much lighter, negatively charged electrons. Protons supply the positive charge, and each element has a different number of them. The number of protons in the nucleus dete...
atom See all related content mass number, in nuclearphysics, the sum of the numbers of protons and neutrons present in the nucleus of anatom. The mass number is commonlycitedin distinguishing among the isotopes of an element, all of which have the sameatomic number(number of protons) and are...
The atomic number of an atom is determined by: ___ A certain atom has an atomic mass of 19 and atomic number of 9. Using a periodic table, what element is this? If the atomic number of an element is 12 and the atomic mass is 25: a. How many protons are there in the nucleus...