https://padlet.com/3033861/4rzezyvbhbdj en-us 2017-12-06 17:26:01 UTC 2023-05-07 22:07:37 UTC hello@padlet.com 3033861 https://padlet.com/3033861/4rzezyvbhbdj/wish/213815075  In each period(horizontal row), the atomic numbers increase from left to right. The periods are numbered 1 through 7 on the left-hand side of the table. Elements that are in the same period have chemical properties that are not all that similar.]]> 2017-12-06 17:27:00 UTC https://padlet.com/3033861/4rzezyvbhbdj/wish/213815075 3033861 https://padlet.com/3033861/4rzezyvbhbdj/wish/213817185 In the periodic table of the elements, each numbered column is a group. In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. ]]> 2017-12-06 17:30:44 UTC https://padlet.com/3033861/4rzezyvbhbdj/wish/213817185 3033861 https://padlet.com/3033861/4rzezyvbhbdj/wish/213818217 The alkali metals are a group in the periodic table consisting of the chemical elements lithium, sodium, potassium, rubidium, caesium, and francium.]]> 2017-12-06 17:32:36 UTC https://padlet.com/3033861/4rzezyvbhbdj/wish/213818217 3033861 https://padlet.com/3033861/4rzezyvbhbdj/wish/213819474 The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).]]> 2017-12-06 17:34:41 UTC https://padlet.com/3033861/4rzezyvbhbdj/wish/213819474 3033861 https://padlet.com/3033861/4rzezyvbhbdj/wish/213819955 any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.]]> 2017-12-06 17:35:33 UTC https://padlet.com/3033861/4rzezyvbhbdj/wish/213819955 3033861 https://padlet.com/3033861/4rzezyvbhbdj/wish/213820886 any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table. They are all radioactive, the heavier members being extremely unstable and not of natural occurrence.]]> 2017-12-06 17:37:06 UTC https://padlet.com/3033861/4rzezyvbhbdj/wish/213820886 3033861 https://padlet.com/3033861/4rzezyvbhbdj/wish/213821641 any of the set of metallic elements occupying a central block (Groups IVB–VIII, IB, and IIB, or 4–12) in the periodic table, e.g., iron, manganese, chromium, and copper. Chemically they show variable valence and a strong tendency to form coordination compounds, and many of their compounds are colored.]]> 2017-12-06 17:38:17 UTC https://padlet.com/3033861/4rzezyvbhbdj/wish/213821641 3033861 https://padlet.com/3033861/4rzezyvbhbdj/wish/213822462 any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.]]> 2017-12-06 17:39:43 UTC https://padlet.com/3033861/4rzezyvbhbdj/wish/213822462