Question

Ajutoooooooooooor!!! ​

Answer 1

Răspuns:

1. Litiu, Li, 3, 7, 3, 4, 4

2. Sulf, S, 16, 32, 16, 16, 16

3. Siliciu, Si, 14, 28, 14, 14, 14

4. Potasiu, K, 19, 39, 19, 20, 20

5. Fosfor, P, 15, 31, 15, 16, 16

6. Cupru, Cu, 29, 64, 29, 35, 35

7.Calciu, Ca, 20, 40, 20, 20, 20

• Formulele pe care le am folosit:

Numarul atomic = Z

Numarul de masa = A

• neutroni= n⁰= A- Z
• protoni= p+= Z
• electroni= e‐= p+