Question

Выпишите элементы второй А группы Выпишите элементы третьего периода

Answer 1

2 А группа: Mg, Be, Ca, Sr, Ra, Ba
Третий период: Al, Ar, Na, Si, S, P, Cl, Mg.

Воот:)

Answer 2

Вторая А группа:
Be, Mg, Ca, Sr, Ba, Ra
Третий период:
Na, Mg, Al, Si, P, S, Cl, Ar

Answer 3

Elements of the Second A Group:

The elements of the second A group in the periodic table are as follows:

1. Beryllium (Be) - Atomic number: 4 - Atomic mass: 9.0122 - Electron configuration: 1s^2 2s^2

2. Magnesium (Mg) - Atomic number: 12 - Atomic mass: 24.305 - Electron configuration: 1s^2 2s^2 2p^6 3s^2

3. Calcium (Ca) - Atomic number: 20 - Atomic mass: 40.078 - Electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

4. Strontium (Sr) - Atomic number: 38 - Atomic mass: 87.62 - Electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2

5. Barium (Ba) - Atomic number: 56 - Atomic mass: 137.327 - Electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2

Elements of the Third Period:

The elements of the third period in the periodic table are as follows:

1. Sodium (Na) - Atomic number: 11 - Atomic mass: 22.99 - Electron configuration: 1s^2 2s^2 2p^6 3s^1

2. Magnesium (Mg) - Atomic number: 12 - Atomic mass: 24.305 - Electron configuration: 1s^2 2s^2 2p^6 3s^2

3. Aluminum (Al) - Atomic number: 13 - Atomic mass: 26.982 - Electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^1

4. Silicon (Si) - Atomic number: 14 - Atomic mass: 28.085 - Electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^2

5. Phosphorus (P) - Atomic number: 15 - Atomic