C 2. C 3. C 4. C 5. A 6. C 7. D 8. A 9. B 10. A

1. - BAI 1 DAP AN LY THUYET VA BAI TAP TRONG TAM VE NHOM HALOGEN KG
BAI 1 DAP AN LY THUYET VA BAI TAP TRONG TAM VE NHOM HALOGEN KG

1. C 2. C 3. C 4. C 5. A 6. C 7. D 8. A 9. B 10. A