Trong nguyên tử một nguyên tố A có tổng số các loại hạt là 58. Biết số hạt p ít hơn số hạt n là 1 hạt. Xác định tên và kí hiệu của A. (Tiện thể cho e xin cách làm các bài hóa tính số hạt luôn đc ko ạ. Em cảm ơn!)

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VIII/ The present simple or the present continuous tense: 1. My father (have) __________ coffee for breakfast every day. 2. His sister (study) __________ in a shoe store this summer. 3. The students (look) ___________ up that new word now. 4. Mary (go) __________ to school every day. 5. They (do) ¬__________ this exercise at the moment. 6. Ms Eden (read) ¬¬¬¬___________......... a newspaper now. 7. It (rain) __________ very much in the summer. It (rain) _________ now. 8. Bad students never (study) __________ hard. 9. He generally (sing) ________ in English, but today he (sing) ________.......... in Spanish. 10. We seldom (eat) __________..... before 6.30. 11. She sometimes (buy) ___________......vegetables at his market. 12. We always (do) ___________ our exercises carefully. 13. Look! A man (run) ________ after the train. He (want) _______ to catch it. 14. It (be) __________ very cold now. 15. John (travel) __________ to England tomorrow. 16. My mother (cook) __________ some food in the kitchen at present. She always (cook) __________ in the mornings. 17. I often (leave) __________ the city at weekends. 18. The guests (watch) __________ the TV programes now. 19. The sun (set) __________ in the west. 20. My friend (study) __________ English for an hour every night. 40. The workers ( build) ................................a new house right now 28. Be quiet! The baby ( sleep).................................. 29. Look! A man ( run) .......................after the train. 30.Mai (cook)................................... some food at present. She always (cook)..................... in the morning 33. The students ( do)......................the test right now? 72. He always (borrow) ____me money and never (give)_____ back. 1. I (move) ______________ to another town next week.