Giúp mình với. Bài1: Tổng số proton, notron, electron trong nguyên tử của 1 nguyên tố là 34. Xác định nguyên tử khối của nguyên tố. Bài2: Tổng số hạt trong hạt nhân của 1 nguyên tử là 7. Tìm số lượng mỗi hạt có trong nguyên tử đó. Giải chi tiết giúp mình. Cảm ơn.

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Bài 1

2Z+N=34

1 ≤N/Z ≤1,5

Z ≤N ≤1,5Z

3Z ≤34 ≤3,5Z

9,7 ≤Z ≤11,3

⇒Z=10 ⇒N=14 ⇒A=24 ( loại)

Z=11 ⇒N=12 ⇒A=23(Na)

Bài 2

Z+N=7

1 ≤ N/Z≤1,5

Z ≤N ≤1,5Z

2Z ≤7 ≤2,5Z

2,8 ≤Z ≤3,5

⇒Z=e=3 , N=4

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Mark the letter A, B, e,or D to indicate the underlined part that needs correction in each of the following questions. ( sửa lỗi luôn ạ) 51. A lot of people think that marriage women shouldn't pursue a career. A B C D 52. We must stop discrimination on people coming from the rural area. A B C D 53. My brother is good with cooking and he can cook very delicious food. A B C D 54. I guess they may be kept home doing housework and look after their chifdren, A B C D 55. Women in rural areas might be forced to work both at home but on the fields. A B C D 56. Some people think that girls shouldn't be allowed to going to university. A B C D 57. Gender discrimination should be eliminated for create equal opportunities in educationfor everyone. A B C D 58. More girls should being chosen to represent us in the School Youth Union .. A B C D 59. Both women and men should be given equal rights for education and employment. A B C D 60. This discrimination against women and girls must be abolishing. A B C D 61. Efforts should be make to offer all children equal access to education. A B C D 62. It is clear that gender differences cannot prevent a person to pursue a job. A B C D 63. Traditional women were mainly responsible to doing housework and looking after their husbands and A B C D children. 64. Doing houseworkevery day is really boring and tired. A B C D 65. In the past, women was often passive and dependent on their husbands. A B C D 66. Women usually get less pay as men for doing the same job. A B C D

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