PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free Demo1. An atom has electronic configuration 2, 8, 7.
(a) What is the atomic number of this element ?
(a) What is the atomic number of this element ?
2. Where do you think should hydrogen be placed in the Modern periodic table?
Answer variants:
Hydrogen element has been placed at the top of group 2.
Hydrogen element has been placed at the top of group 3.
Hydrogen element has been placed at the top of group 1.
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