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 balance between the number of protons and electrons determines the charge of the atom once it forms compounds.Answer and Explanation: The chemical symbol of beryllium is Be. Its atomic number is 4. For any element, its atomic number is equal to its number of proton...
百度试题 结果1 题目What is the atomic number of carbon? A. 6 B. 8 C. 12 D. 14 相关知识点: 试题来源: 解析 A。解析:碳的原子序数是6。选项B,8是氧的原子序数。选项C,12是碳的相对原子质量。选项D,14是硅的原子序数。反馈 收藏
What is the atomic number?Atoms:Atoms are the basic unit of matter. Each atom has a dense nucleus composed of neutrons and protons. It also has a less dense outer electron cloud. Neutral atoms contain the same number of protons and electrons, which are positively and negatively charged, ...
The atomic number of each element, which is the number of protons in its nucleus, appears next to its symbol in the table. If the atomic number wasn't there, you could still tell how many protons were in the nucleus of a given element by counting the number of places between that ...
It is the number of an element in thePeriodic table of the elements.结果一 题目 What is the atomic number of an element?ps:Please answered in English 答案 译文,什么是元素的原子序数? It is the number of an element in thePeriodic table of the elements. 相关推荐 1 What is the atomic ...
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 of an element also gives the number of electrons.
What is the atomic number of oxygen?A、2B、6C、8D、20Answer:C科目四考试网___科目四考试题库
an atom. Another big reason it matters is because the modern periodic table is organized according to increasing atomic number. Finally, the atomic number is a key factor in determining the properties of an element. Note, however, the number of valence electrons determines chemical bonding ...
(a) What is the atomic number of the element ? (b) State whether element Z is a metal or a non-metal (c) What type of ion (if any) will be formed by an atom of element Z ? Why ? (d) What is special about the outermost electron shell of the atom of this element ?