Which element is in Group 17 and has 7 valence electrons? A. Fluorine B. Chlorine C. Bromine D. All of the above 相关知识点: 试题来源: 解析 D。解析:氟(Fluorine)、氯(Chlorine)、溴(Bromine)都属于第17族(卤族元素),它们的最外层都有7个电子,所以这三个选项都正确,答案为D。
which element has atoms with more valence electrons than kernel electrons?a.Beb.Fc.Nad.Pe.Ar为什么是选B?什么是valence electron?什么是kernel electron?. 答案 valence electron 价电子kernel electron 内层电子 ( kernel 核)Be 1s2 2s2 价电子与内层电子数相等F 1s2 2s2 2p5 价电子数多于内层电子数Na...
百度试题 结果1 题目43. Which element has atoms with exactly four valence electrons in its ground state? C(A)Ca (B) Cr (C) Si(D)S 相关知识点: 试题来源: 解析 C 反馈 收藏
A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it? What is the atomic number of carbon-12? Which group of elements is the least reactive? What is the atomic number of tin-119? What is the atomic number of cerium?
A certain element has its outermost electron in a 3p subshell. It has valence +3 because it has three more electrons than a certain noble gas. Identify the number of electrons in the ground-state outer shell of atomic phosphorous. What is the order of the number of free electr...
Which element is expected to have a “sea” of electronsA.HydrogenB.NitrogenC.CobaltD.ChlorineE.Oceanium的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,
相关知识点: 试题来源: 解析 CThe only correc answer is CA is not correc becaus it contain delocalise electronsB is not correct becaus it contain delocalise electronsD is not correct because it contain delocalise electrons 反馈 收藏
For sodium just has K L and M shells (2 8 1) while calcium has K L M and N (2 8 8 2). 2008-01-18 16:30:26 补充： The nuclear charge of Ca must be greater than Na due to 20 protons attract 2粒 outermost shell electrons paring Na with 11protons...
To determine which element has the highest shielding constant among magnesium, aluminum, potassium, and gallium, we will follow these steps:Step 1: Understand Shielding Constant The shielding constant refers to the extent to wh
What is the number of electrons in each energy level for the element, H? What is the electron configuration of an element with atomic number 15? Which group of elements has the lowest ionization energy? The elements of which group are nonreactive? What is the neutral ...