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Molecular Elements and Diatomic Molecules Quiz

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Molecular Elements and Diatomic Molecules Quiz

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Questions and Answers

What is the key characteristic that defines a molecular element?

It is a mixture of elements that are not chemically combined.
It consists of atoms of the same element joined together. (correct)
It is a pure substance composed of two or more different elements.
It is a compound formed by chemically joining different elements.

How many diatomic molecular elements are mentioned in the given text?

8
6
5
7 (correct)

What is the meaning of the prefix 'di-' in the term 'diatomic molecule'?

It refers to the molecule consisting of two atoms. (correct)
It indicates that the molecule is a compound.
It refers to the presence of two different types of atoms.
It signifies that the molecule is a mixture of elements.

What is the nonsensical word provided to help remember the seven diatomic molecules?

HOF BRINCI (B) Signup and view all the answers

What is the purpose of using a nonsensical word like 'HOF BRINCI' in the text?

To provide a mnemonic device for remembering the diatomic molecules. (C) Signup and view all the answers

What is the primary composition of air according to the passage?

80% nitrogen molecules and 20% oxygen molecules (A) Signup and view all the answers

What is the chemical formula for a nitrogen molecule?

N2 (D) Signup and view all the answers

What does the subscript in a chemical formula represent?

The number of atoms of the preceding element in the molecule (B) Signup and view all the answers

What is the purpose of a chemical formula?

To indicate the type and number of atoms in a pure substance (D) Signup and view all the answers

What is the definition of a molecule according to the passage?

Two or more atoms of the same or different elements that are chemically joined together in a unit (C) Signup and view all the answers

According to the Writing Tip, what should be done before writing a science report?

Say the purpose of the report aloud and turn it into a question (D) Signup and view all the answers