https://padlet.com/304971/u1qvnph3m5jw Made with a dash of wit en-us 2017-12-06 17:24:14 UTC 2023-05-20 14:51:51 UTC hello@padlet.com 304971 https://padlet.com/304971/u1qvnph3m5jw/wish/213813955 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 17:24:58 UTC https://padlet.com/304971/u1qvnph3m5jw/wish/213813955 304971 https://padlet.com/304971/u1qvnph3m5jw/wish/213814035 In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, and the f-block columns (between groups 3 and 4) are not numbered.]]> 2017-12-06 17:25:07 UTC https://padlet.com/304971/u1qvnph3m5jw/wish/213814035 304971 https://padlet.com/304971/u1qvnph3m5jw/wish/213814135 An alkali metal is any of the elements found in Group IA of the periodic table. Alkali metals are very reactive chemical species which readily lose their one valence electron to form ionic compounds with nonmetals. Examples: Lithium, Potassium, Cesium.]]> 2017-12-06 17:25:15 UTC https://padlet.com/304971/u1qvnph3m5jw/wish/213814135 304971 https://padlet.com/304971/u1qvnph3m5jw/wish/213814290 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 17:25:32 UTC https://padlet.com/304971/u1qvnph3m5jw/wish/213814290 304971 https://padlet.com/304971/u1qvnph3m5jw/wish/213814523 Any of a series of 15 naturally occurring metallic elements. The lanthanides include elements having atomic numbers 57 (lanthanum) through 71 (lutetium). They are grouped apart from the rest of the elements in the Periodic Table because they all behave in a similar way in chemical reactions. ]]> 2017-12-06 17:25:57 UTC https://padlet.com/304971/u1qvnph3m5jw/wish/213814523 304971 https://padlet.com/304971/u1qvnph3m5jw/wish/213814638 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 17:26:09 UTC https://padlet.com/304971/u1qvnph3m5jw/wish/213814638 304971 https://padlet.com/304971/u1qvnph3m5jw/wish/213814778 All the transition metals have two electrons in their outermost shell, and all but zinc, cadmium, and mercury have an incompletely filled inner shell (just inside the outermost shell).]]> 2017-12-06 17:26:24 UTC https://padlet.com/304971/u1qvnph3m5jw/wish/213814778 304971 https://padlet.com/304971/u1qvnph3m5jw/wish/213814910 ny 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 17:26:40 UTC https://padlet.com/304971/u1qvnph3m5jw/wish/213814910