https://padlet.com/306195/f5jppns5kt2r Made with a lightning strike of genius en-us 2017-12-06 19:10:17 UTC 2026-02-15 20:26:13 UTC hello@padlet.com 306195 https://padlet.com/306195/f5jppns5kt2r/wish/213870411 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 19:11:31 UTC https://padlet.com/306195/f5jppns5kt2r/wish/213870411 306195 https://padlet.com/306195/f5jppns5kt2r/wish/213870824 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 19:12:19 UTC https://padlet.com/306195/f5jppns5kt2r/wish/213870824 306195 https://padlet.com/306195/f5jppns5kt2r/wish/213871022 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 19:12:43 UTC https://padlet.com/306195/f5jppns5kt2r/wish/213871022 306195 https://padlet.com/306195/f5jppns5kt2r/wish/213871604 any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.]]> 2017-12-06 19:13:48 UTC https://padlet.com/306195/f5jppns5kt2r/wish/213871604 306195 https://padlet.com/306195/f5jppns5kt2r/wish/213871777 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 19:14:07 UTC https://padlet.com/306195/f5jppns5kt2r/wish/213871777 306195 https://padlet.com/306195/f5jppns5kt2r/wish/213872417 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 19:15:19 UTC https://padlet.com/306195/f5jppns5kt2r/wish/213872417 306195 https://padlet.com/306195/f5jppns5kt2r/wish/213872513 The control group is defined as the group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do.]]> 2017-12-06 19:15:30 UTC https://padlet.com/306195/f5jppns5kt2r/wish/213872513 306195 https://padlet.com/306195/f5jppns5kt2r/wish/213872557 A period is the name given to a horizontal row of the periodic table]]> 2017-12-06 19:15:35 UTC https://padlet.com/306195/f5jppns5kt2r/wish/213872557