https://padlet.com/304990/njtlbb5adb8j en-us 2017-12-06 18:19:08 UTC 2024-09-30 17:51:27 UTC hello@padlet.com 304990 https://padlet.com/304990/njtlbb5adb8j/wish/213843986 A period in the periodic table is one of the horizontal rows, all of whose elements have the same number of electron shells]]> 2017-12-06 18:21:14 UTC https://padlet.com/304990/njtlbb5adb8j/wish/213843986 304990 https://padlet.com/304990/njtlbb5adb8j/wish/213844077 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 18:21:24 UTC https://padlet.com/304990/njtlbb5adb8j/wish/213844077 304990 https://padlet.com/304990/njtlbb5adb8j/wish/213844168 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 18:21:34 UTC https://padlet.com/304990/njtlbb5adb8j/wish/213844168 304990 https://padlet.com/304990/njtlbb5adb8j/wish/213844385 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 18:21:55 UTC https://padlet.com/304990/njtlbb5adb8j/wish/213844385 304990 https://padlet.com/304990/njtlbb5adb8j/wish/213844657 any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.]]> 2017-12-06 18:22:22 UTC https://padlet.com/304990/njtlbb5adb8j/wish/213844657 304990 https://padlet.com/304990/njtlbb5adb8j/wish/213844853 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 18:22:40 UTC https://padlet.com/304990/njtlbb5adb8j/wish/213844853 304990 https://padlet.com/304990/njtlbb5adb8j/wish/213845058 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 18:23:00 UTC https://padlet.com/304990/njtlbb5adb8j/wish/213845058 304990 https://padlet.com/304990/njtlbb5adb8j/wish/213845283 any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table.]]> 2017-12-06 18:23:26 UTC https://padlet.com/304990/njtlbb5adb8j/wish/213845283