Question

The element with the atomic number 118, will be

• A. alkali
• B. noble gas
• C. lanthanide
• D. transition element

Hint:

The outermost electronic configuration of an element with atomic number 118 is 7s²7p⁶

Answer 1

The Correct Option is B

To determine the type of element with the atomic number 118, we need to understand its position on the periodic table.

1. The element with atomic number 118 is known as Oganesson (Og).
2. Oganesson is placed in Group 18 of the periodic table.
3. Group 18 elements are known as the noble gases. They are characterized by having a filled valence shell, making them extremely stable and largely unreactive under normal conditions.

Given these considerations, the correct classification for the element with atomic number 118 is a noble gas.

Let's evaluate the other options to further establish the correctness of our answer:

• Alkali: These are Group 1 elements which are highly reactive metals and include elements like Lithium (Li), Sodium (Na) etc. Oganesson (Og) is not an alkali metal.
• Lanthanide: Lanthanides are elements with atomic numbers 57 to 71. Oganesson is beyond this range, so it's not a lanthanide.
• Transition Element: Transition metals are found in Groups 3 to 12. Oganesson, being in Group 18, cannot be a transition metal.

Therefore, option noble gas is indeed the correct choice.