engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 General Science Chemistry Periodic Table

কোনও পরমাণুতে, অন্তিম কক্ষপথে (যোজ্যতা কক্ষপথ) ইলেকট্রনের সংখ্যা সর্বাধিক কত?

1
12
2
10
3
8
4
4
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