Question

с помощью таблице Менделеева определите и запишите относительные атомы массы элементов вс порядковыми номерами :3,5,7,9,12,15,16,17,20,27,30.​

Answer 1

Ответ:

3 - 7 Li

5 - 11 B

7 -  14 N

9 - 19 F

12 - 24 Mg

15 - 31 P

16 - 32 S

17 - 35.5 Cl

20 - 40 Ca

27 - 59 Co

30 - 65 Zn

Answer 2

Relative Atomic Masses of Elements

To determine the relative atomic masses of the elements with atomic numbers 3, 5, 7, 9, 12, 15, 16, 17, 20, 27, and 30, we can refer to the periodic table of elements. Here are the relative atomic masses for each element:

1. Lithium (Li) - Atomic Number 3 - Relative Atomic Mass: 6.94 2. Boron (B) - Atomic Number 5 - Relative Atomic Mass: 10.81 3. Nitrogen (N) - Atomic Number 7 - Relative Atomic Mass: 14.01 4. Fluorine (F) - Atomic Number 9 - Relative Atomic Mass: 18.99 5. Magnesium (Mg) - Atomic Number 12 - Relative Atomic Mass: 24.31 6. Phosphorus (P) - Atomic Number 15 - Relative Atomic Mass: 30.97 7. Sulfur (S) - Atomic Number 16 - Relative Atomic Mass: 32.07 8. Chlorine (Cl) - Atomic Number 17 - Relative Atomic Mass: 35.45 9. Calcium (Ca) - Atomic Number 20 - Relative Atomic Mass: 40.08 10. Cobalt (Co) - Atomic Number 27 - Relative Atomic Mass: 58.93 11. Zinc (Zn) - Atomic Number 30 - Relative Atomic Mass: 65.38 Please note that the relative atomic masses provided above are approximate values and may vary slightly depending on the source.