百度试题 结果1 题目25 Selenium, Se, is in the same group of the Periodic Table as sulfur, S What is the formula of sodium selenide? A ANa2Se BNaSeO C Na2SeO D Na SeO: 相关知识点: 试题来源: 解析 A 反馈 收藏
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
Answer to: Identify the group and period for each of the following. Refer to the periodic table. Label each as a metal, nonmetal, or metalloid. ...
Group VIA Element refers to the elements in Group VIA of the periodic table, such as sulfur and selenium, which form binary compounds with hydrogen. These elements exhibit trends in the properties of their hydrogen compounds, including decreasing thermal stability in the order of phosphorus, arsenic...
Example:Sulfur (16) - 2,8,6 Group = no. of valence electrons ie 10 = 6+ 10 = 16 If the element is in the d block, the number of electrons in the (n-1)d subshell + no of electrons in (n) s subshell. The group number is determined by this formula. ...
Which of the following has the largest atomic radius? (a) calcium (a) potassium (c) bromine (d) sodium. From their relative positions in the Periodic Table, which atom in each set is more electronegative? a. Carbon or nitrogen b. Chlorine...
VIth group of the mannered null periodic table of the elements of the installation of the sulfur to insidePROBLEM TO BE SOLVED: To provide a method for incorporating sulfur into pores of a catalyst for hydrocarbon treatment at a high sulfidization rate.ピエール デュフレン...
Use the periodic table to describe which elements form ionic bonds, and which elements form covalent bonds. Which are the four most abundant elements in living cells? (a) Carbon, oxygen, nitrogen, sulfur (b) Carbon, oxygen, hyd...
Sign in to download full-size image Figure 9.10.Changes in the solubility of sulfur in magma with respect to oxidation state. Immiscible sulfide liquids are stable in the system at oxidation states below QFM+1.5, while sulfate is stable at oxidation states above QFM+2. ...
Facts You Should Know: The Periodic Table Quiz The element selenium (symbol Se) is much rarer than oxygen or sulfur, comprising approximately 90 parts per billion of the crust of the Earth. It is occasionally found uncombined, accompanying native sulfur, but is more often found in combination ...