Question

Строение электронных оболочек атомов первых 20 химических элементовомогите пожалуйста!

Answer 1

Всё есть в таблице Менделеева, находишь и смотришь. (Распределение электронов на энергетических уровнях)
 Пример: (Водород) Н1е-

Answer 2

Structure of Electronic Shells of the First 20 Chemical Elements

The electronic structure of atoms is organized into shells and subshells, which are represented by the principal quantum number (n) and the azimuthal quantum number (l), respectively. Here's a breakdown of the electronic shells of the first 20 chemical elements:

1. Hydrogen (H) - Helium (He) - Hydrogen has one electron in the first shell (1s¹), while helium has two electrons in the first shell (1s²).

2. Lithium (Li) - Neon (Ne) - Lithium has two electrons in the first shell and one electron in the second shell (1s² 2s¹), while neon has two electrons in the first shell and eight electrons in the second shell (1s² 2s² 2p⁶).

3. Sodium (Na) - Argon (Ar) - Sodium has two electrons in the first shell, eight electrons in the second shell, and one electron in the third shell (1s² 2s² 2p⁶ 3s¹), while argon has two electrons in the first shell, eight electrons in the second shell, and eight electrons in the third shell (1s² 2s² 2p⁶ 3s² 3p⁶).

4. Potassium (K) - Calcium (Ca) - Potassium has two electrons in the first shell, eight electrons in the second shell, and one electron in the third shell (1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹), while calcium has two electrons in the first shell, eight electrons in the second shell, and eight electrons in the third shell (1s² 2s² 2p⁶ 3s² 3p⁶ 4s²).

5. Scandium (Sc) - Argon (Ar) - Scandium has two electrons in the first shell, eight electrons in the second shell, and two electrons in the third shell (1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹), while argon has two electrons in the first shell, eight electrons in the second shell, and eight electrons in the third shell (1s² 2s² 2p⁶ 3s² 3p⁶).

6. Potassium (K) - Zinc (Zn) - Potassium has two electrons in the first shell, eight electrons in the second shell, and eight electrons in the third shell (1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹), while zinc has two electrons in the first shell, eight electrons in the second shell, and 18 electrons in the third shell (1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰).

7. Gallium (Ga) - Krypton (Kr) - Gallium has two electrons in the first shell, eight electrons in the second shell, and 18 electrons in the third shell (1s²