https://padlet.com/304503/2uryri2dya28 12-6-17 period 1 en-us 2017-12-06 16:23:22 UTC 2023-06-02 09:26:09 UTC hello@padlet.com 304503 https://padlet.com/304503/2uryri2dya28/wish/213779774 Now you know about periods going left to right. The periodic table also has a special name for its vertical columns. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital.]]> 2017-12-06 16:26:06 UTC https://padlet.com/304503/2uryri2dya28/wish/213779774 304503 https://padlet.com/304503/2uryri2dya28/wish/213780876  In chemistry, a group is a vertical column in the Periodic Table. Groups may be referred to either by number or by name. For example, Group 1 is also known as the Alkali Metals. For further information, read about the Chemistry of Groups.]]> 2017-12-06 16:27:33 UTC https://padlet.com/304503/2uryri2dya28/wish/213780876 304503 https://padlet.com/304503/2uryri2dya28/wish/213781859 of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.]]> 2017-12-06 16:28:53 UTC https://padlet.com/304503/2uryri2dya28/wish/213781859 304503 https://padlet.com/304503/2uryri2dya28/wish/213783139 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 16:30:55 UTC https://padlet.com/304503/2uryri2dya28/wish/213783139 304503 https://padlet.com/304503/2uryri2dya28/wish/213784372 any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.]]> 2017-12-06 16:32:58 UTC https://padlet.com/304503/2uryri2dya28/wish/213784372 304503 https://padlet.com/304503/2uryri2dya28/wish/213785435 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 16:34:42 UTC https://padlet.com/304503/2uryri2dya28/wish/213785435 304503 https://padlet.com/304503/2uryri2dya28/wish/213786971 any of the set of metallic elements occupying a central block (Groups VIIB–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 16:37:03 UTC https://padlet.com/304503/2uryri2dya28/wish/213786971 304503 https://padlet.com/304503/2uryri2dya28/wish/213787790 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 16:38:23 UTC https://padlet.com/304503/2uryri2dya28/wish/213787790