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
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 , indicates number of protons present in the nucleus of an atom, which is also equal to ...
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 "mass number" or "atomic mass" of an atom is the sum of the number of both protons and neutrons in its nucleusWhat is an Atomic Number? An atomic number is the number of protons contained within the nucleus of an atom. Each element on the periodic table has a different atomic ...
Atomic number (the number of protons in the nucleus), not atomic mass number (the number of protons and neutrons), determines chemical behavior. 子句类型: 宾语从句 连接词: THAT 3. 句子成分 主句 We [主语] now [状语] know [谓语] something. [宾语] 分句-1 Atomic number (the number...
Atomic number and mass number are always whole numbers because they are obtained by counting whole objects (protons, neutrons, and electrons). The sum of the mass number and the atomic number for an atom (A-Z) corresponds to the total number of subatomic particles present in the atom. The...
nucleiIN 1933 Elsasser 1 pointed out that some of the properties of atomic nuclei correspond to greater stability for certain numbers of neutrons and protons (given the name magic numbers) than for other numbers; the magic numbers for both N (neutron number) and Z (proton number) are 2, 8...
19.As annotation, an equation of the relation between neutrons and protons in nuclei and its periodical solutions as well as atomic number limit are discussed. 作为诠释,探讨了原子核内中子与质子的趋势关系方程,以及其周期解和原子序数极限值。
Atomic nuclei are now known to be made up of protons and neutrons. The protons feel repulsion from each other due to their positive electric charge, but the attractive strong force between the protons and neutrons overcomes this repulsion to hold nuclei together....
Protons supply the positive charge, and each element has a different number of them. The number of protons in the nucleus determines the atomic number of an element. It's different from atomic mass or atomic weight, which take into account the presence of neutrons. Every atom of a given ...