plutonium, and heluim
Groups. Elements in the same group have similar electronegativity properties.
The English name for copper is derived from the Latin word "cuprum," which was the ancient name for the island of Cyprus where copper was mined. This is different from many other elements that have names based on their properties, origins, or other characteristics.
Bromine and iodine are two elements that have properties similar to chlorine. They are all halogens and share common characteristics such as high reactivity and the ability to form compounds with other elements easily.
Ekasilicon was the name appointed by Mendeleev to the undiscovered germanium; germanium has similar chemical properties to silicon and tin.
"heat treatable aluminum alloy". There are usually other elements added as well, for various properties.
mendeleev's name for a column of elements was groups.
Copper(I) chloride.
The groups each have different names. Group one is made up of Alkali Metals (except for Hydrogen). Group two is made of Alkali Earth Metals. The other groups include Transition Metals, Noble Gases, Poor Metals and Non Metals.
Yes; for example group 1 is also called alkali metals.
Elements in Group 14 on the Periodic Table have similar properties to carbon. These elements are carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl). Each of these elements has two electrons in the outermost p orbital, the electron configuration ns2np2, and they tend to adopt oxidation sates of +4 (+2 for the heavier elements due to the inert pair effect). Silicon is most similar to carbon.
The periodic table got its name from the periodic pattern of chemical properties that occur when elements are organized by increasing atomic number. This organization allows elements with similar properties to fall in the same column, creating a "periodic" pattern.
Because in the table the elements are arranged into "periods", elements belonging to the same period have similar physical/chemical properties. This in tern reflects the fact that they have a similar number of outer shell electrons.