NOTES FOR रसायन विज्ञानं IN HINDI FOR GOVT JOBS EXAM
Sodium | Compounds Sodium (Na) Sodium (Na) Its atomic number is 11 and mass number is 23. It belongs to group-1, 3rd period and s-block of the periodic table. Its electronic configuration is 1s2 2s2 2p6 3s1 Earth’s crust contains 2.27% sodium by weight. Because of its high reactivity, sodium is always found in combined …
Hydrogen and Its Compounds Hydrogen (symbol H) has atomic number 1 and mass number 1. It was discovered by Henry Cavendish in 1766 but named by Antoine Lavoisier. It has the simplest atomic structure among all the elements around us in nature. In atomic form, it consists of only one proton and one electron but …
What is Elements The electronic configuration of atoms provides a theoretical foundation for the periodic classification. Elements of a group exhibit similar chemical properties because they have same electronic configuration of their outermost shell. Depending upon the type of orbital receiving the valence electron, the elements can be classified into following four blocks Types …
Acids Bases And Salts Class 10 Notes Acids (अम्ल ) The word ‘acid’ has been derived from a Latin word ‘acidus’ meaning sour. ( एसिड शब्द एक लैटिन शब्द ‘एसिडस’ से लिया गया है जिसका अर्थ खट्टा है। ) acids are the substances that have sour taste ( एसिड वे पदार्थ हैं जिनका स्वाद खट्टा …