Electronegativity is a measure of the ability of an atom or molecule to attract electrons toward itself in a chemical bond. It is a fundamental concept in chemistry that helps us understand the behavior of molecules in chemical reactions. Electronegativity is usually measured using the Pauling scale, which assigns values between 0 and 4 to … Read more
In order to overcome the objections raised against Rutherford’s model of the atom, Neils Bohr put forward the following postulates about the model of an atom: These orbits or shells are called energy levels. Energy levels in an atom are shown in figure.These orbits or shells are represented by the letters K,L,M,N,… or the numbers, … Read more
Methanal or the saturated aqueous solution of formaldehyde (40% by volume, 37% by weight) is known as 100% formalin which is mainly used to preserve dead animals.
The physical and chemical properties of the elements repeat periodically with their atomic number.
Facebook is a social networking site that makes it easy for you to connect and share with family and friends online. Originally designed for college students, Facebook was created in 2004 by Mark Zuckerberg while he was enrolled at Harvard University. By 2006, anyone over the age of 13 with a valid email address could … Read more
Electron configuration is the distribution of electrons in various shells for any element. Such as electron configuration of Al is-Al(13)→ 2, 8, 3
Arranging the elements based on their molecular weight, their physical and chemical properties are noticed to periodically reoccur.
Around the nucleus there are some circular stable axis on which electron moves around. These are called energy level or orbit.