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...
#化学小知识# The number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z. The number of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom is determined very nearly by the total ...
Name of element Symbol Atomic number (number of protons) 元素名称元素符号原子序数(质子的数目) jw2019 Astronomers term "metals" those elements with higher atomic numbers than helium. 天文学家把原子量比氦更大的元素称为“金属”。 LASER-wikipedia2 The atomic number of zinc is 30. 鋅的...
Number ofNeutrons=Mass Number- Atomic Number Find the Number of Protons Each element is defined by the number of protons found in each of its atoms. No matter how many electrons or neutrons an atom has, the element is defined by its number of protons. In fact, it's actually possible to...
百度试题 结果1 题目The total number of protons and neutrons in an atom is calledA.the atomic numberB.the proton numberC.the mass numberD.the neutron number 相关知识点: 试题来源: 解析 C 反馈 收藏
Atomic number - number of protons = ___. Subatomic Particles: Proton (a particle with a positive charge) is one of the subatomic particles, along with electrons and neutrons, found in the atom. In order to solve the given equation for the problem, we need to define first the atomic numb...
百度试题 结果1 题目 6 Compared to an atom of C-12, an atom of C-14has a greater (4)(1)number of electrons(2)number of protons(3)atomic number(4)mass number 相关知识点: 试题来源: 解析 (4) 反馈 收藏
1. Definition of Protons: Protons are positively charged particles found in the nucleus of an atom. Each element has a unique number of protons. Hint: Remember that protons contribute to the overall charge and identity of the atom. 2. Atomic Number: The number of protons in an atom is ref...
since an atom cannot have a fractional number of protons. What is the difference between an atomic number and a mass number? The "atomic number" of an atom is equal to the number of protons it contains. The "mass number" or "atomic mass" of an atom is the sum of the number of ...