Pert 10 Unsur Golongan VII A & VIII A

Summary

In this lecture on inorganic chemistry, the instructor explores non-metal elements in groups 7A (halogens) and 8A (noble gases). Key topics include the electronic configurations, characteristics, sources, and everyday functions of elements such as fluorine, chlorine, bromine, iodine, and the noble gases helium, neon, argon, krypton, xenon, radon, and oganesson. The discussion emphasizes their significance in various applications, from dental care to industrial uses, encouraging students to engage further through a creative assignment related to their properties.

Takeaways

• 😀 The lecture focuses on non-metal elements, specifically groups 7A (halogens) and 8A (noble gases) in the periodic table.
• 😀 Group 7A includes halogens such as fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tenessine (Ts), each with distinct properties and uses.
• 😀 Fluorine (F) is a highly reactive yellow gas, found in toothpaste as fluoride to strengthen teeth.
• 😀 Chlorine (Cl) is a pale green gas used in disinfectants and bleaching agents, commonly known as household bleach.
• 😀 Bromine (Br) is a reddish-brown liquid that is toxic and is used in some fuels and organic compounds.
• 😀 Iodine (I) is a dark blue solid important for thyroid health, often added to table salt as iodized salt.
• 😀 Astatine (At) is a rare, radioactive element with medical applications, particularly in cancer treatment.
• 😀 Group 8A consists of noble gases like helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og), known for their stability and non-reactivity.
• 😀 Helium (He) is used as a safe, non-flammable gas for balloons and in deep-sea diving equipment.
• 😀 The lecturer assigns a creative task for students to create an original artwork or poem related to three chosen elements from the lecture.

Q & A

What are the main topics covered in the lecture on inorganic chemistry?

The lecture discusses non-metal elements, specifically focusing on group 7A (halogens) and group 8A (noble gases).

What is the electronic configuration of fluorine?

Fluorine has an atomic number of 9, with the electronic configuration of 1s² 2s² 2p⁵.

What are some characteristics of chlorine?

Chlorine is a pale green gas that is diatomic, has a pungent odor, and is corrosive, causing irritation.

How can bromine be obtained?

Bromine can be sourced from bromide salts or as organobromine compounds produced by marine organisms.

What role does iodine play in human health?

Iodine is essential for the production of thyroid hormones and can prevent conditions like goiter, which is an enlargement of the thyroid gland.

What is astatine and what is its primary use?

Astatine is a radioactive element used in targeted alpha-particle cancer therapy due to its isotopic properties.

What is the significance of helium in practical applications?

Helium is commonly used as a lifting gas in balloons and in deep-sea diving as part of breathing mixtures.

What is the main characteristic of argon?

Argon is the most abundant noble gas on Earth, often used in industries for aluminum production and in semiconductors.

What is the electronic configuration of neon?

Neon has an atomic number of 10 and an electronic configuration of 1s² 2s² 2p⁶.

What unique properties does radon possess?

Radon is a radioactive noble gas that is produced from the decay of radium and is used in certain cancer therapies.