A) Protons and neutronsB) Protons and electronsC) Electrons and neutronsD)Electrons, protons, and neutronsAnswer: A 相关知识点: 试题来源: 解析 A 选项A中的质子和中子位于原子核内,构成了原子的主要质量,而电子的质量极小,可忽略不计。原子质量数即质子数与中子数之和。选项B和C错误地包含了电子,而...
This then implies that the D'Alembertian of the mass density is proportional to the square of the charge density. It is speculated that this may be applicable to the internal distributions of mass and charge of electrons, protons and neutrons as evidenced by electromagnetic stering experiments....
Careful measurements have shown that the mass of a particular atom is always slightly less than the sum of the masses of the individual neutrons, protons, and electrons of which the atom consists. The difference between the mass of the atom and the sum of the masses of its parts is called...
Atom consist of electrons , protons and neutrons . If the mass attributed to neutron were halved and that attributed to the electrons were doubled , the atomi
What is the relative mass for protons, neutrons, and electrons? How do you compare the size and density of an atom with its nucleus? The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the binding energy per nucleon (in J) of a...
of its constituentprotons,neutrons, and electrons. Mass was no longer considered unchangeable in the closed system. The difference is a measure of thenuclear bindingenergywhich holds the nucleus together. According to the Einstein relationship (E=mc2), this binding energy is proportional to thismass...
An atom has a mass number of 22 and an atomic mass of 20.2. Determine its atomic symbol, atomic number, and number of protons, electrons, and neutrons.Atom:It is a minor substance that is present in the element. Each ...
How do you use the key on your periodic table to find out the number of protons, neutrons, and electrons in an element? Element Atomic # Atomic mass # of protons # of electrons # of neutrons Mg Rb Au Pb Explain how to draw the nucleus of an atom. Draw the nucleus...
This obvious misnomer is motivated by the fact that the energy density of these coupled particles is dominated by the rest masses of the protons and neutrons making up the hydrogen and helium nuclei. In the following, we will simply speak of protons although one should keep in mind that this...
Which of the following have a mass of 1? (a) Protons and electrons. (b) Protons and neutrons. (c) Electrons and neutrons. (d) None of the above. Atom and Subatomic Particles: An atom is the smallest particle of an e...