Một nguyên tử ngtố X có tổng số hạt e,p,n là 52. Tìm số khối A của X, biết rằng trong X có 1 < hoặc = N phần Z < hoặc = 1.222

2 câu trả lời

Đáp án:

A = 35

Giải thích các bước giải:

Đáp án:

Giải thích các bước giải:

- Đề cho tổng hạt là: 52 => p+e+n = 2p+n=52 -> n = 52-2p

1 < hoặc = n phần p < hoặc = 1.222 => 1 < hoặc = 52-2p phần p < hoặc = 1.222

<=> p < hoặc = 52-2p < hơn hoặc = 1.222p

<=> p < hoặc = 52-2p

52- 2p < hoặc = 1.222p

<=> p + 2p < hoặc = 52

52 < hoặc = 1.222p +2p

<=> 3p < hoặc = 52

52 < hoặc = 3.222p

<=> 3p < hoặc = 52

3.222p < hoặc = 52

<=> p < hoặc = 52 phần 3

p < hoặc = 52 phần 3.222

<=>p xấp xỉ 17.333

p xấp xỉ 16.139

<=>p = 17

Vì p = e => e = 17

2p + n = 52

=> n = 52 - 17 nhân 2 = 18

A = p +n

=> A = 17 +18 = 35

Câu hỏi trong lớp Xem thêm

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

0 lượt xem
2 đáp án
16 giờ trước