百度试题 结果1 题目What is a row of elements on the periodic table called? A. octave B. period C. group D. transition 相关知识点: 试题来源: 解析 B 反馈 收藏
百度试题 结果1 题目What is the second element on the periodic table of elements?A.HydrogenB.Helium 相关知识点: 试题来源: 解析 B 反馈 收藏
解析 Ans. The d block elements are in the middle of S and p blocks, comprising the groups 3to 12.They are the four rows of elements in the periods 4h (3d series), 5th (4d series), 6th ( 5d series)and 7h ( 6d series).
百度试题 结果1 题目What are the horizontal rows in the periodic table called? A. Groups B. Blocks C. Periods D. Orbitals 相关知识点: 试题来源: 解析 C。原因:文章中明确提到“The horizontal rows are called periods.”。 反馈 收藏
百科挑战题1) What is the letter forprop in the periodic table of chemical elements(化学素周期)? A.Fe B.Zn C.Ha2) What is the best way to look up information on the interne? A. By using e-mail B. By using QQ B33) What is the material of pengl leag()? A.lime B. graphite(...
结果1 题目 21 Period 3 of the Periodic Table is shown.Na Mg AL Si PS Cl Ar What increases from left to right across Period 3? C A density B melting point C non-metallic character D the number of electron shells 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
From group 3 through group 7, early transition metals are found on the left side of the periodic table. Late transition metals, which range from group 8 to 11, are found on the right side of the d-block (and 12 if it is counted as transition metals). ...
What is helium in the periodic table? What is lithium in the periodic table? Most elements on the periodic table are what? What is between metals and nonmetals on the periodic table? What are the heavy metals on the periodic table?
The Periodic Table is a table of all the elements we know about today. Elements are placed in order of atomic number ( number of protons in the nucleus ).
(a) What is a group in the periodic table in which part of a group would you separately expect elements to have (i) the greatest metallic character (ii) the largest atomic size? (b) In what respects do the properties of group 1 elements differ from those of group 17 elements? Explai...