# Atomic Structure Question

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- [math]""_6 ^12C and ""_6 ^12C [/math]
- [math]""_6 ^14C and ""_7 ^14N [/math]
- [math]""_6 ^14C and ""_6 ^12C [/math]
- [math]""_6 ^14C and ""_6 ^14C^-4 [/math]