3. Which configuration cannot exist?
A. 5f
B.2s
C. 1p
D. 3p
4. Which electron configuration is a noble gas?
A. 1s²
B. 1s² 2s² 3p²
C.1s² 2s² 2p²
D. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
5. Which group in the periodic table of elements is the least reactive?
A. Actinides
B. Halogens
C. Lanthanides
D. Noble gases
A. 5f
B.2s
C. 1p
D. 3p
4. Which electron configuration is a noble gas?
A. 1s²
B. 1s² 2s² 3p²
C.1s² 2s² 2p²
D. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
5. Which group in the periodic table of elements is the least reactive?
A. Actinides
B. Halogens
C. Lanthanides
D. Noble gases
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Answer:
d
c
d
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sana makatulong
#keep it up
Answer:
3. D.
4. D.
5. A
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