What are the 7 periods on the periodic table? There are 7 periods on the periodic table, numbered down the left side of the table. These periods are named according to their numbers: period 1, period, 2, etc. What is the difference between a group and a period in the periodic table?
What are the 7 periods on the periodic table? There are 7 periods on the periodic table, numbered down the left side of the table. These periods are named according to their numbers: period 1, period, 2, etc. What is the difference between a group and a period in the periodic table?
The atomic mass and the name of the element are shown below the symbol. The color indicates the physical state of the element at 25℃. The periodic table contains a wealth of chemistry information if you know how to read it. The...
The arrangement of the periodic table is now based on howelectrons fill various energy levels3. Organization:a.Period: horizontal row of elements by increasing atomic number; seven periods exist at this time (example: Period 1 is hydrogen to helium, Period 2 is lithium to neon) b.Group: ...
The arrangement of the periodic table is now based on howelectrons fill various energy levels3. Organization:a.Period: horizontal row of elements by increasing atomic number; seven periods exist at this time (example: Period 1 is hydrogen to helium, Period 2 is lithium to neon) b.Group: ...
The Periodic Table was developed in 1869 and it revolutionised science. It's organised into groups and periods, and an element's position can tell us a great deal . To revise what you learned in Year 10 and year 11, have a go at this GCSE chemistry quiz
结果1 题目What are the horizontal rows in the periodic table called? A. Groups. B. Periods. C. Elements. D. Compounds. 相关知识点: 试题来源: 解析 B。中文解析:“The periods are horizontal rows”,周期表中的水平行称为周期。反馈 收藏 ...
In the periodic table the elements are arranged into periods andgroups. A row of elements across the table is called a period. Each period hasa number: from 1 to 7. Period 1 has only 2 elements in it: hydrogen and helium. Period 2 and Period 3both have 8 elements. Other periods are...
periodic table[¦pir·ē¦äd·ik ′tā·bəl] (chemistry) A table of the elements, written in sequence in the order of atomic number or atomic weight and arranged in horizontal rows (periods) and vertical columns (groups) to illustrate the occurrence of similarities in the properti...
百度试题 结果1 题目There are ___ periods in the periodic table. A. 7 B. 8 C. 9 D. 10 相关知识点: 试题来源: 解析 A。目前元素周期表有 7 个周期。反馈 收藏