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Lý thuyết Đơn chất Nitrogen - Hóa học 11 - Cánh diều

- Kí hiệu hóa học: N. - Số hiệu nguyên tử: 7. - Trong tự nhiên: tồn tại ở cả đơn chất và hợp chất. - Trong khí quyển: chủ yếu dưới dạng đơn chất N2. - Trong đất và nước: ion NO3-, NO2-, NH4+. - Trong cơ thể sinh vật: amino acid, protein…

𒁏Tổng hợp đề thi học kì 2 lớp 11 tất cả các môn - Cánh diều

Toán - Văn - Anh - Lí - Hóa - Sinh

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I. Trạng thái tự nhiên của nguyên tố Nitrogen

- Kí hiệu hóa học: N.- Số hiệu nguyên tử: 7.- Trong tự nhiên: tồn tại ở cả đơn chất và hợp chất.

- Trong khí quyển: chủ yếu dưới dạng đơn chất N₂.

- Trong đất và nước: ion NO₃^-, NO₂^-, NH₄⁺.

- Trong cơ thể sinh vật: amino acid, protein…

II. Đơn chất Nitrogen

1. Đặc điểm liên kết

- Phân tử N₂ có liên kết ba giữa hai nguyên tử nitrogen.

2. Tính chất cơ bản

a, Tính kém hoạt động hóa học (tính trơ) ở nhiệt độ thấp

- Liên kết ba có năng lượng rất lớn ( 946 kj/mol) nên khó bị phá vỡ và tham gia phản ứng. Do vậy nên đơn chất nitrogen kém hoạt động hóa học.

b, Tính hoạt động hóa học ở nhiệt độ cao

3. Ứng dụng

- 💫Được sử dụng để thay thế một phần hay toàn bộ không khí nhằm tạo môi trường trơ, hạn chế cháy nổ, hạn chế sự oxi hóa thực phẩm…

- Nitrogen lỏng được dùng làm môi trường lạnh để bảo quản mẫu vật trong ý tế và nghiên cứu khoa học …

SƠ ĐỒ TƯ DUY

Chia sẻ

Bình luận

Bình chọn:

4.9 trên 7 phiếu

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Luyện Bài Tập Trắc nghiệm Hóa 11 - Cánh diều - Xem ngay

Báo lỗi - Góp ý

Tham Gia Group Dành Cho Lớp 11 Chia Sẻ, Trao Đổi Tài Liệu Miễn Phí

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