and electrons.The protonsare positively charged and are in the nucleus.Neutrons are also in the nucleus.Butthey have no charge.And electrons orbit the nucleus.They have negative charges.The number of protons and neutrons in an atom is often-but not always-thesame.Every element has a different...
Definitions The primary building blocks of atoms are protons, neutrons, and electrons. It is convenient to describe the composition of an atom in terms of the number of protons and neutrons in its nucleus (Figure 1 ). The term atomic number , conventionally denoted by the symbol Z , ...
百度试题 结果1 题目The atomic number of an element represents the number of ___. A. protons B. neutrons C. electrons D. protons and neutrons 相关知识点: 试题来源: 解析 A。元素的原子序数代表质子数(protons)。反馈 收藏
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...
The meaning of ATOMIC NUMBER is an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines t
© Boardworks Ltd 2007 1 of 44 What is the atomic number? Every element has a unique atomic number. This is the number of protons in the nucleus of each atom. What is the atomic number of this helium atom? A neutral atom must have equal numbers of protons and electrons, so the ...
Atomic number = number of protons # protons = # electrons IN NEUTRAL ATOMS. Today in Physical Science Chemistry: Inside the Atom Chapter 3 Part 2. How Atoms Differ Atoms differ in the number of protons they have. – Oxygen has 8 Protons, Fluorine 9 Protons, ...
A simplified look into the structure of an atomExplore an atom's interior to discover the layout of its nucleus, protons, and electrons. See all videos for this article In the symbol representing a particular nuclear or atomic species, the atomic number may be indicated as a left subscript....
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...
Each element on the periodic table has a different atomic number. Currently, the atomic numbers of known elements range from 1 to 118. The nucleus of an atom contains protons and neutrons. An atom's electrons are found in orbitals around the nucleus. The atomic number definition is based on...