A MODERN table of chemical elements must show electronic configurations as well as the variation in the properties of the elements with atomic number. It should also include the lanthanide and ...

RBSE 10th Model Papers 2026: The Board of Secondary Education, Rajasthan (RBSE), Ajmer has released the RBSE Class 10 Model Papers 2025–26 for students appearing in the Rajasthan Board Exam 2026.

ICSE Exam Dates 2026: The ICSE Class 10 Date Sheet 2026 is available on the official website of the Council for the Indian School Certificate Examinations (CISCE) — cisce.org. As per the schedule, the ...

IT will doubtless interest readers of NATURE to know that other elements besides neon (see NATURE for November 27, p. 334) have now been analysed in the positive-ray spectrograph with remarkable ...