Demitri Mendeleeve (Russian – 1869) was published the first periodic table, based on atomic mass.
He also predicted some properties of unidentified elements that were expected to fill gaps within the table. Mendeleev's idea has been slowly expanded and refined with the discovery or synthesis of further new elements and the development of new theoretical models to explain chemical behaviour.
The modern periodic table now provides a useful framework for analyzing chemical reactions, and continues to be widely used in chemistry, nuclear physics and other sciences.
Finally describe on Metallic Character, Classifying the Elements, Atomic Radius, Ionization Energy and Electronegativity.
All of science deals with the interaction between energy and matter.
What is the total number of protons in the nucleus of an atom of potassium-42?
Compared to the nonmetals in Period 2, the metals in Period 2 generally have larger 1. What is the charge of the nucleus in an atom of oxygen-17? In which group on the Periodic Table would element X be found? Use it and any other resources to answer the questions on the following assignment.It is perfectly acceptable to search for the answers to any of these questions on sources outside the dynamic periodic table. Element X is a solid that is brittle, lacks luster, and has six valence electrons. Which element is malleable and conducts electricity? The organization of the periodic table can be used to derive relationships between the various element properties, and also to predict chemical properties and behaviours of undiscovered or newly synthesized elements.Russian chemist Dmitri Mendeleev published the first recognizable periodic table in 1869, developed mainly to illustrate periodic trends of the then-known elements. Which are the two liquids at STP on the Periodic Table? Answer the following questions below and list the ANSWERS ONLY to the end of your assignment.