https://padlet.com/3045371/u00xw8w48pxm Padlet en-us 2017-12-06 16:25:54 UTC 2024-10-29 09:46:38 UTC hello@padlet.com 3045371 https://padlet.com/3045371/u00xw8w48pxm/wish/213781485 A period is the name given to a horizontal row of the periodic table. ... Period 1 contains only two elements: hydrogen and helium]]> 2017-12-06 16:28:24 UTC https://padlet.com/3045371/u00xw8w48pxm/wish/213781485 3045371 https://padlet.com/3045371/u00xw8w48pxm/wish/213782837 a number of people or things that are located close together or are considered or classed together.]]> 2017-12-06 16:30:23 UTC https://padlet.com/3045371/u00xw8w48pxm/wish/213782837 3045371 https://padlet.com/3045371/u00xw8w48pxm/wish/213783060 any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table]]> 2017-12-06 16:30:47 UTC https://padlet.com/3045371/u00xw8w48pxm/wish/213783060 3045371 https://padlet.com/3045371/u00xw8w48pxm/wish/213783218 Any of a group of metallic elements including calcium, strontium, magnesium, barium, beryllium, and radium.]]> 2017-12-06 16:31:04 UTC https://padlet.com/3045371/u00xw8w48pxm/wish/213783218 3045371 https://padlet.com/3045371/u00xw8w48pxm/wish/213783358 any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.]]> 2017-12-06 16:31:17 UTC https://padlet.com/3045371/u00xw8w48pxm/wish/213783358 3045371 https://padlet.com/3045371/u00xw8w48pxm/wish/213783487 any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table]]> 2017-12-06 16:31:31 UTC https://padlet.com/3045371/u00xw8w48pxm/wish/213783487 3045371 https://padlet.com/3045371/u00xw8w48pxm/wish/213783632 In chemistry, the term transition metal (or transition element) has three possible meanings: The IUPAC definition defines a transition metal]]> 2017-12-06 16:31:44 UTC https://padlet.com/3045371/u00xw8w48pxm/wish/213783632 3045371 https://padlet.com/3045371/u00xw8w48pxm/wish/213784529 In chemistry, a group is a vertical column in the Periodic Table]]> 2017-12-06 16:33:11 UTC https://padlet.com/3045371/u00xw8w48pxm/wish/213784529