百度试题 结果1 题目25 Bromine is in Group VIl on the Periodic Table.Which describes the appearance of bromine at room temperature?C A grey solid B purple fumes C red-brown liquid D yellow gas 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
Chapter 5 The Periodic Table: Group2MgO
The metals of Group 2 from top to bottom are Be, Mg, Ca, Sr, and Ba. Which one of these elements will form ions most readily and why? View Solution With reference to period 3 of the periodic table - State: The formula of the chloride of the element with electronic configuration 2,...
essentially periodic sequence 本性周期序列 mean periodic functions 平均周期函数 相似单词 periodic a. 1.周期的,定期的,循环的 2.高碘的 3.封闭的(曲线) non periodic 非周期,非周期的 periodic(al) 定期的,间歇 quasi periodic 准周期的 table n.[C] 1.桌子,台子;餐桌 2.餐桌全套餐具;就餐 3...
8 Silicon is an element in Group IV of the Periodic Table.(a) One of the isotopes of silicon is:Si Deduce the number of electrons, neutrons and protons in one atom of this isotope of silicon.14number of electrons16number of neutrons...14number of protons...3](b)Silicon reacts ...
aon descending a group in the periodic table such as lithium,sodium,potassium,rubidium,caesium,the size of the atoms increases due to the effect of extra shells of electrons being added;this outweighs the effect of increased nuclear charge 在周期表里下降一个小组例如锂,钠,钾,铷,铯,原子增量的...
2 The elements in Group 17 of the Periodic Table are called the halogens. They form stable compounds with both metals and non-metals.The table gives some dat a about F2, HCl and CaF2.HCL CaF2boiling point/K851882773relative formul a mass38.036.578.1(a)(i) State what is meant by the ...
Group, in chemistry, a column in the periodic table of the chemical elements. In a group, the chemical elements have atoms with identical valence electron counts and identical valence vacancy counts. Groups are numbered from 1 to 18. Learn more about gro
What is the element in one of the two groups on the left or the six groups on the right of the periodic table? On the periodic table, what are elements from the 7A(17) group called? Which is the most reactive element among the halogens in...
2 Elements in the same group of the Periodic Table often show trends in physical properties and similarities in chemical properties.(a)Name a group in the Periodic Table and briefly describe a trend in a physical property shown on moving down this group.name of group I (the alkali metals)tr...