The Group 18 elements are called the noble gases or sometimes inert gases. Wikipedia has information on the noble gases, and a link is provided.
The noble gases (aka inert gases) are the most stable elements.
The Inert Gases of Group 0 rarely combine with other elements as they are (exc. Radon) extremely unreactive. The Inert Gases are:HeliumNeonArgonKryptonXenon(Radon)
The noble gases
Metals is a common noun. Proper nouns are the unique names of people, places, or things. Common nouns are words for general things.
All of them, given the proper conditions.
In a chemical context, the names of elements are typically not capitalized unless they are derived from proper nouns, such as "Americanium."
In the question above, nouns and sentence are the only nouns. Neither of which are proper nouns.
Proper nouns are specific names given to unique persons, places, or things, starting with a capital letter. They distinguish from common nouns by pointing to a particular entity, for example, "New York City" instead of just "city." Proper nouns are used to identify individual entities and convey specificity in communication.
Proper nouns: New York City, Coca-Cola Common nouns: dog, table
There are no proper nouns in the sentence.
Proper nouns are always capitalised, but adjectives are not.
Proper nouns are the unique names of people, places, or things. Common nouns are the words for general things. Pronouns always replace proper and common nouns.
The word December is a proper noun; the common noun is month.
Proper Nouns: Used to define the specific name of a noun. Common Nouns: The general form of nouns.
Two kinds of nouns are common or proper, singular or plural.
Proper nouns are the unique names of people, places, or things. Common nouns are the words for general things.