user-avatar
nguyencamhuyen030617
2 năm trước
Nguyên tử Na (11e, 11p, 12n). Nguyên tử Al (13e, 13p, 14n). a) Hãy tính khối lượng của các nguyên tử trên. b) Tính tỉ số khối lượng nguyên tử so với khối lượng hạt nhân. Từ đó có thể coi khối lượng nguyên tử thực tế bằng khối lượng hạt nhân được không?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

XIII. Complete the second sentence so that it has the same meaning as the first. 1. I’m really excited about the upcoming pottery workshop. → I’m looking 2. We invited a pop star to the chat show, but he didn't arrive. → The pop star 3. He misbehaved in the class so the teacher asked him to go out. → The teacher asked 4. The artisans carved figures of lions and unicorns on the top of the box. → Figures 5. Don't leave the computer on when you leave. → Turn 6. They wanted to apologize for their behavior: that’s why they paid for dinner. → They paid for dinner in order 7. When I was a child, I usually went to the local park every Saturday afternoon. → When I was a child, I used 8. Their teacher is making them study hard. → They XIV. Join each pair of sentences, using the word or phrase in brackets. 1. Hoa was born in Doc So craft village. She knows the process of making pottery. (BECAUSE) 2. The library was bombed. Many important historical documents were destroyed. (WHEN) 3. She entered the room. She knew there was something wrong. (AS SOON AS) 4. We decided to take rooms in Longwood House. We knew we could not afford the rent. (EVEN THOUGH) 5. My mom instructed me through 15 stages of making a conical hat. I could make one for me. (SO THAT) 6. You want to knit a hat for your friend. You should watch tutorials on YouTube. (BEFORE) 7. I was not enjoying the party. I wanted to leave early. (AS) 8. I was cleaning out my cupboards. I found these photos. (WHILE) 9. I went to Malaysia last year. I wanted to experience a whole new world. (IN ORDER TO) 10. I attended a knitting workshop last Sunday. I don’t know how to knit a scarf. (ALTHOUGH)

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team