Sodium Chloride Story: The Birth of an Ionic Bond

The video explains the formation of the ionic compound sodium chloride from sodium and chlorine atoms. Sodium, with an atomic number of 11, loses one electron to achieve a stable electronic configuration similar to neon. Chlorine, with 17 electrons, gains an electron to achieve a configuration similar to argon. This electron transfer results in the formation of a positively charged sodium cation and a negatively charged chloride anion. The opposite charges attract, forming an ionic bond. The video also covers the calculation of net charges and the stability achieved by both ions.

What is the electronic configuration of a sodium atom?

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3p²

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3p¹

Why is sodium highly reactive?

• It has a stable electronic configuration.

• It has a full outer shell.

• It needs to gain an electron to achieve stability.

• It has one more electron than the nearest noble gas.

What is the electronic configuration of a chlorine atom?

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s¹ 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁴

What happens when sodium and chlorine atoms come close to each other?

• Sodium gains an electron from chlorine.

• Chlorine loses an electron to sodium.

• Sodium transfers an electron to chlorine.

• They form a covalent bond.

What type of bond is formed between sodium and chloride ions?

• Hydrogen bond

• Metallic bond

• Ionic bond

• Covalent bond