Atomic Number: The atomic number is equal to the number of protons in an atom. The atomic number is important because it identifies an atom as a specific element. Answer and Explanation:1 The atomic number of lithium is 3. This means that lithium has 3 protons. You can find the atomic ...
The atomic number of radon is 86. The atomic number is equal to the number of protons in an element. Each element has a characteristic number of...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough...
The charge on a nucleus is 01:01 The atomic number of an element is equal to the number of 02:08 Neutron was discovered by 00:56 Which of the following is a nucleon? 01:18 The mass number of a nucleus is equal to the number of 01:55 The nucleus of an atom is composed of 01:...
1. Understanding Atomic Number: The atomic number of an atom is defined as the number of protons present in the nucleus of that atom. It is denoted by the symbol 'Z'. 2. Electrons in a Neutral Atom: In a neutral atom, the number of protons is equal to the number of electrons. This...
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
In an electrically neutral atom, the atomic number (number of protons) is equal to the number of electrons. Why the Atomic Number Is Important The main reason the atomic number is important is because it's how you identify the element of an atom. Another big reason it matters is because ...
Note: Atomic mass is a dimensionless quantity. Since the atomic number of sodium is 11, it has got 1 electron in the valence shell. Therefore, the valency of sodium is 1. The number of protons is equal to the number of electrons in sodium. But when s...
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...
___分析的方法。当我们做某项活动时，我们期望从中获益并且识别出与之相关的___成本。___是指多做一点带来的收益；___是指多做一点带来的成本。尽管边际成本可能是常数，但通常不是。更典型的是，当我们增加一单位某活动时，这额外一单位的成本可能会___...
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...