百度试题 结果1 题目The total number of protons and neutrons in an atom is calledA.the atomic numberB.the proton numberC.the mass numberD.the neutron number 相关知识点: 试题来源: 解析 C 反馈 收藏
.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. .The elements in a period all have the same number of shells (so the shielding effect is the same). .This means that as you go across...
The number of protons in an atom equals the number of ___. The sum of an atom's protons and neutrons is its What nuclide has 27 protons and 33 neutrons? The atomic mass is equal to: A. the number of neutrons. B. the number of protons plus the number of electrons. C. the number...
Which of the following elements has the least number of protons? A. Hydrogen B. Helium C. Lithium D. Beryllium 相关知识点: 试题来源: 解析 A。解析:氢(Hydrogen)的原子序数为1,也就是质子数为1;氦(Helium)原子序数为2,质子数为2;锂(Lithium)原子序数为3,质子数为3;铍(Beryllium)原子序数为4,...
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 ...
百度试题 结果1 题目4 In which atom is the number of protons equal to the number of neutrons? D A 40Ar B 19 F C 23Na D 16O 相关知识点: 试题来源: 解析 D 反馈 收藏
It is the number of protons that determines the atomic number.的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,是学习的生产力工具
The periodic table is a chart that reflects the periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of increasing atomic number (the number of protons in the nucleus). It is a monumental scientific achievement, and its development illustra...
1 Complete the following table which gives the number of protons, electrons and neutrons in each of the five particles.number of particle number of number of protons electrons neutrons1919202oFe3243Ga3+343645[Total: 8] 相关知识点: 试题来源: ...
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