periodic table - Why are group 1 elements called alkali metals and ...
2017年1月18日 · I was studying the periodic table. My teacher said that . Group 1 elements are called alkali metals because their oxides are soluble in water and group 2 elements are called alkaline earth metals as their oxides form in the earth and are water soluble.
periodic table - Actinides and Lanthanides group - Chemistry …
2015年2月4日 · The periodic table actually looks like this:...you can see that the first 14 elements in either series don't belong to any group from the main body of the table. You could say that the lanthanides and actinides form fourteen new 2-element groups, with Lu and Lr belonging to group 3. But IUPAC does not number these groups:
nomenclature - Are periods the horizontal numbers on the …
2023年9月15日 · In the periodic table, elements in a given group form a column (top to bottom, or vertical). Periods. Here are two examples of periods. The second period (boxed in magenta) comprises 8 elements, and the sixth period (boxed in purple) comprises 32 elements. In the periodic table, elements in a given period form a row (left to right, or horizontal).
inorganic chemistry - Where hydrogen belongs in the Periodic …
2017年7月16日 · Elsewhere in the periodic table, alkali metals which have only one or two valence electrons want to get rid of them, to get back to a complete valence shell underneath. They'd need to gain 6, 7 or even more electrons to stabilize their existing valence shells, and that's unlikely (they don't have enough electrons to share, and their nucleus ...
Periodic Table Group 3 Period 6, 7 - Chemistry Stack Exchange
2024年10月19日 · The periodic table developed by Mendeleev is an incredibly useful tool for predicting the physical and chemical properties of elements, but you must understand that it has limitations. I linked the wikipedia page on the history of the periodic table.
Why does hydride acidity increase across period and down group …
2018年5月30日 · Conversely, at the far left of the table, the Group 1A atoms hold on so loosely to their lone electron that the H atom is able to leave with the metal's electrons, as H-. Going down the table, you add a whole electron shell between the …
Why exactly does atomic radius increase down a group?
2016年11月8日 · Down a group means that the valence electrons are on a higher energy level (they are further away from the nucleus). You would also expect that going down a group, nuclear charge increases (more protons), however, the electrostatic strength down a …
periodic table - Why don't Schools follow latest IUPAC for naming ...
2015年10月14日 · In high school I am taught that Group 7 were halogens and Group 8 were noble gases, and Group 3 the boron group, Group 4 was carbon group, etc. Then when I looked up the groups, I found that noble gases were group 18, halogens were group 17, Group 7 was the manganese group, ...
Why does ionization energy increase as we go from left to right in …
2015年4月15日 · From what I understand, in a stepwise ionization process, it is always the highest-energy electron (the one bound least tightly) that is removed first. So when we go more to the right in the periodic table, there are more electrons, and thus much more possibility for these to shield the outer electron from attraction to the nucleus.
Why are metalloids found in a zig-zag line on the periodic table
2017年6月21日 · Elements on the periodic table tend to follow this trend: Metallic character increases as you move down a group: This is because every step you move down the group, an extra shell of electrons is added, along with a bunch of protons that increase nuclear attraction. The extra shell factor plays the dominant role, making the outermost electron ...