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定...
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...
atomic number 1.Or proton number (Z) The number of protons in the nucleus of an atom. If not electrically charged, this is equal to the number of electrons in its shells. 2.The number of protons in the nucleus of an atom. Dictionary of Unfamiliar Words by Diagram Group Copyright © ...
The number of protons in an atom of any given element is always the same. Physicists call this the atomic number. So, in the above example of lead, its atomic number is 82 and that does not change; if it did, it would be a different element (thallium, atomic number 81, or bismuth...
FEMALE STUDENT: The number of protons in each atom of an element. MALE PROFESSOR: Right.Well, early versions of the periodic table had gaps. Missing elements.Every time you have one more proton you have another element,and then — oops — there'd be an atomic number for which there was...
6. Radioactivity, nuclear fission and the atom bomb A plot of all known stable nuclei together with radioactive nuclei: A compilation of all observed nuclei plotted in terms of the number of protons in the nucleus versus the number of neutrons. Stable nuclei are shown in black, and unstable...
The oxidation state of an atom in a compound is a measure of ___. A. the number of protons B. the number of neutrons C. the degree of oxidation D. the degree of reduction 相关知识点: 试题来源: 解析 C。解析:氧化态是衡量一个原子在化合物中氧化程度的指标。反馈 ...
Describe the structure of an atom.An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. The number of protons determines
in their number of neutrons, and hence in their atomic mass.The isotopes of a given element have the same chemical properties but slightly different physical properties.We now know that atomic number (the number of protons in the nucleus), not atomic mass number (the number of protons and ...
The graph shows a decrease in atomic radii of period 3 elements across the period. ·Across the period,the atomic radii decrease .This is because the number of protons (the nuclear charge) and the number of electrons increases by one every time you go an element to the right. ...