What is the main component of the atomic mass in English? A. Protons B. Electrons C. Neutrons D. Protons and neutrons 相关知识点: 试题来源: 解析 D。本题考查原子质量的主要组成部分。质子和中子的质量较大,是原子质量的主要构成部分,电子质量很小可忽略。选项 A 仅提到质子,不全面。选项 B 电子...
The atomic weight of an atom, or the molecular weight of a molecule, is its mass relative to that ofa___ atom. This is essentially equal to the number of protons plus neutrons that the atom or molecule contains. A oxygen B hydrogen C helium D carbon 相关知识点: 试题来源: 解析 B ...
The atomic mass of the element is determined by the combined masses of neutrons and protons. True or false? Explain. Answer and Explanation: The atomic mass or atomic weight of an element (or put it in simple term, mass of an atom) is found ...
The atomic number is the number of protons in an atom and the mass number is the number of protons plus the number of neutrons. The atomic number is... Learn more about this topic: Atomic & Mass Number | Overview & Difference from ...
The Atomic Number of an atom: ... is the number of protons in the atom. It is sometimes represented by the symbol 'Z'. TheAtomic Number (Z)is sometimes called the 'Proton Number'. The Mass Number of an atom: ... is the total number of protons and neutrons in the atom. It is ...
The mass number of argon is 40.How many protons, neutrons and electrons are there in an argon atom? ( ) 相关知识点: 试题来源: 解析 一个氩原子有 18 个质子、22 个中子和 18 个电子。 1. 原子序数: 氩的原子序数为 18,这意味着它的原子核中有 18 个质子。 2. 质量数: 氩的质量数为 40...
Protons have apositive(+1)charge, which balances the negative (-1) charge of theelectronsthat surround the nuclei of atoms. Protons have arelative massof 1, which is the same as the relative mass of neutrons. Thenumber of protons in an atomis called the 'Atomic Number' of that atom and...
ICSEC - Grade 09 - CHEMISTRY - Atomic Structure And Chemical Bonding - Q23
Generally, mass is defined as the measure of how much matter an object or body contains - the total number of sub-atomic particles (electrons, protons and neutrons) in the object. If you multiply your mass by the pull of earth's gravity, you get your weight. So if your body weight is...
The nucleus has a positive charge equal to Ze , where e is the magnitude of the electron charge and Z the number of protons present – the atomic number. The total number of protons plus neutrons is the mass number, A . A given element is characterized by its atomic number but may, ...