Atomic number (the number of protons in the nucleus), not atomic mass number (the number of protons and neutrons), determines chemical behavior. 是原子序数(原子核中质子的数量)而不是原子的质量决定化学特性。 全句 We now know that atomic number (the number of protons in the nucleus), not...
#化学小知识# 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 ...
.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...
Thenumberofprotonsisequaltothatofelectronsandthewholeatomiselectricallyneutral. 因为质子数与电子数相等,因此整个原子呈电中性。 Whatwecallairisamixtureofseveraldifferentgases. 我们称之为“空气”的东西是数种气体的混合物。 Howcloseitwillbetozerodependsuponthetorqueconstant(转矩常数)oftheservomotor(伺服电动机)...
A. The number of protons B. The number of neutrons C. The number of electrons D. The sum of protons and neutrons 相关知识点: 试题来源: 解析 A。原子序数由质子数决定。选项 A 正确,原子序数等于质子数。选项 B 中子数不能决定原子序数。选项 C 电子数在原子呈电中性时等于质子数,但不是决定原...
Answer to: The number of protons and neutrons is known as the ___. By signing up, you'll get thousands of step-by-step solutions to your homework...
求翻译:the number of protons是什么意思?待解决 悬赏分:1 - 离问题结束还有 the number of protons问题补充:匿名 2013-05-23 12:21:38 正在翻译,请等待... 匿名 2013-05-23 12:23:18 质子的数目 匿名 2013-05-23 12:24:58 氢核的数量 匿名 2013-05-23 12:26:38 质子数 匿名 ...
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...
Is the mass number the number of protons?Atomic Structure:The structure of atoms is made of subatomic particles. There are three main types, protons, neutrons and electrons. Protons and neutrons make up the nucleus and electrons orbit them in a cloud....
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,...