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 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 ...
百度试题 结果1 题目What is the atomic number of an element?ps:Please answered in English 相关知识点: 试题来源: 解析 最佳答案译文,什么是元素的原子序数?It is the number of an element in thePeriodic table of the elements.反馈 收藏
The atomic number of an atom is determined by: ___ A certain atom has an atomic mass of 19 and atomic number of 9. Using a periodic table, what element is this? If the atomic number of an element is 12 and the atomic mass is 25: a. How many protons are there in the nucleus...
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 ...
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
Sodium chloride is known as 02:24 The compounds) used in Solvay process is/are 02:55 What is atomic number of sodium and Why is sodium metal kept under ker... 01:49 Which of the following carbonates does not evolve CO(2) on heating? 04:02 select the correct statement: 02:18 Sodium...
atomicelectronnumberproton质子boardworks © 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...
What are the atomic number and mass number of bromine-79? How do determine the mass number of the element U not the atomic mass? The atomic number of an atom of an element is 17 while its mass number is 35. How many neutrons does the atom have?
百度试题 结果1 题目2.3. What is the atomic number of Fe? A. 26 B. 56 C. 28 D. 58 相关知识点: 试题来源: 解析 A 反馈 收藏