A. the number of protons an element has B. the number of neutrons an element has C. the number of electron shells an element has D. the number of E. lectrons an element has 相关知识点: 试题来源: 解析 C。解析:The periods represent the number of electron shells an element has.反馈...
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...
FEMALE STUDENT: The number of protons in each atom of an element. MALE PROFESSOR: Right.Well, early versions of the periodic table had gaps. Missing elements.Every time you have one more proton you have another element,and then — oops — there'd be an atomic number for which there was...
1. The Elements and The Periodic Table(元素和周期表) The number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z. The numbers of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom ...
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 their number of neutrons, and hence in their atomic mass.The isotopes of a given element have the same chemical properties but slightly different physical properties.We now know that atomic number (the number of protons in the nucleus), not atomic mass number (the number of protons and ...
number of protons, but differ in their number of neutrons, and hence in their atomic mass. The isotopes of a given element have the same chemical properties but slightly different physical properties. We now know that atomic number (the number of protons in the nucleus), not atomic mass ...
The graph shows a decrease in atomic radii of period 3 elements across the period. ·Across the period,the atomic radii decrease .This is because the number of protons (the nuclear charge) and the number of electrons increases by one every time you go an element to the right. ...
The number of protons in an atom equals the number of electrons. This is necessary to balance the charge of an atom, and to increase its stability... See full answer below.Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our exp...
Describe the structure of an atom.An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. The number of protons determines