Give NCERT top priority because practically all exam questions are derived from NCERT examples and text. Concentrate on heavier subjects like thermodynamics, organic chemistry, hydrocarbons, and ...

An element's atomic number defines it. An element with 17 protons will always be chlorine. However an element's mass numbers can vary, which means that it can have different numbers of neutrons. So ...

In 1913, Niels Bohr revised Rutherford's model by suggesting that the electrons orbited the nucleus in different energy levels or at specific distances from the nucleus. By doing this, he was able to ...

CBSE Class 12 Physics Half Yearly Exam 2025: All CBSE Class 12 students in the science stream, whether they are preparing for non-medical or medical careers, must take Physics as a foundational and ...

Sign up for the Slatest to get the most insightful analysis, criticism, and advice out there, delivered to your inbox daily. On a quiet street 2 miles north of Boston ...

Department of Chemistry, Islamic University of Science and Technology, Awantipora, Jammu and Kashmir 192122, India ...