An atom consists of a fixed number of protons, electrons and neutrons, which makes each element unique. Protons and neutrons together make up thenucleus of an atomwhile the electrons orbit around it. In the periodic table, a chemical element is represented by a fixed format : Atomic number= ...
Reactance is the property of an electrical component to oppose the change in current while impedance is the combination of resistance and reactance. There are two types of reactance: Capacitive & Inductive
History of the Periodic Table –1864 John Newlands An English scientist, he put forward his law of octaves He arranged all the elements known at the time into a table in order of relative atomic massrelative atomic mass When he did this, he found that each element was similar to the elem...
The periodic table is the most important chemistry reference there is. It arranges all the known elements in an informative array. Elements are arranged left to right and top to bottom in order of increasing atomic number. This order generally coincides with increasing atomic mass The different ...
An important part of chemistry is being able to understand the various useful features of the periodic table of the chemical elements. These features include the atomic number, row position and column position of each element. Each row is a period and each column is a group. All groups are ...
The Periodic Table Chemical Elements & Chemical Symbols What is Physical Chemistry? What is Organic Chemistry? What is Inorganic Chemistry? Atoms & Molecules What is a proton ? What is a neutron ? What is an electron ? What is an Atomic Number ? What is a Mass Number (of an atom)? Wha...
What is a representative element in basic chemistry terms? Groupings of the Periodic Table: The periodic table consists of six different groupings of elements. Group 1 consists of the alkali metals, group 2 consists of the alkaline earth metals, groups 3-12 consist of the transition metals, ...
Russian chemistry professor Dmitri Mendeleev is credited with creating the first periodic table in 1869. He laid out the elements by atomic weight, and started a new row when the chemical properties of the elements began to repeat. Mendeleev had the foresight to leave gaps in his table where ...
A bar magnet is a rectangular piece of an object that shows permanent magnetic properties and are made from the ferromagnetic substance. Cylindrical and rectangular bar magnets are the types of bar magnet. They are used in educational institutes.
e- p+ n0 0 amu 1 amu 1 amu Electron proton Neutron Topic: Structure of an Atom Chapter 6-2 part 1 The Atom. The Periodic Table of Elements Chapter 2 Earth Science Mrs. Schwartz ATOMS AND ATOMIC STRUCTURE TOPIC: Chemistry AIM: What is matter? Structure of an Atom. Chapter...