https://padlet.com/304887/bli3qlu2zkgg Made with a stroke of good luck en-us 2017-12-06 16:22:13 UTC 2017-12-06 16:33:49 UTC hello@padlet.com 304887 https://padlet.com/304887/bli3qlu2zkgg/wish/213779523 Periods in the periodic table. 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 16:25:46 UTC https://padlet.com/304887/bli3qlu2zkgg/wish/213779523 304887 https://padlet.com/304887/bli3qlu2zkgg/wish/213780047 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. There are 18numbered groups in the periodic table, and the f-block columns (between groups 3 and 4) are not numbered.]]> 2017-12-06 16:26:27 UTC https://padlet.com/304887/bli3qlu2zkgg/wish/213780047 304887 https://padlet.com/304887/bli3qlu2zkgg/wish/213780670 any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.]]> 2017-12-06 16:27:16 UTC https://padlet.com/304887/bli3qlu2zkgg/wish/213780670 304887 https://padlet.com/304887/bli3qlu2zkgg/wish/213782166 any of the elements beryllium, magnesium, calcium, strontium, barium, and radium, occupying Group IIA (2) of the periodic table. They are reactive, electropositive, divalent metals, and form basic oxides that react with water to form comparatively insoluble hydroxides.]]> 2017-12-06 16:29:18 UTC https://padlet.com/304887/bli3qlu2zkgg/wish/213782166 304887 https://padlet.com/304887/bli3qlu2zkgg/wish/213782767 The lanthanide or lanthanoid series of chemical elements comprises the fifteen metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium.]]> 2017-12-06 16:30:16 UTC https://padlet.com/304887/bli3qlu2zkgg/wish/213782767 304887 https://padlet.com/304887/bli3qlu2zkgg/wish/213783542 The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.]]> 2017-12-06 16:31:36 UTC https://padlet.com/304887/bli3qlu2zkgg/wish/213783542 304887 https://padlet.com/304887/bli3qlu2zkgg/wish/213784284 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 16:32:49 UTC https://padlet.com/304887/bli3qlu2zkgg/wish/213784284 304887 https://padlet.com/304887/bli3qlu2zkgg/wish/213784696 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 16:33:30 UTC https://padlet.com/304887/bli3qlu2zkgg/wish/213784696