In a water molecule, how many types of atoms are present?

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Prepare for the IB Marine Science SL Exam. Study with flashcards and multiple choice questions that include hints and explanations. Ace your exam!

Multiple Choice

In a water molecule, how many types of atoms are present?

Explanation:
The main idea is to distinguish between how many atoms there are and how many different elements are present. In a water molecule, the formula is H2O, which means there are two hydrogen atoms and one oxygen atom. That gives two different elements, so there are two types of atoms. The total number of atoms is three (two hydrogens plus one oxygen), but the question asks for types, not total count. That’s why the correct choice is the one that reflects two types of atoms.

The main idea is to distinguish between how many atoms there are and how many different elements are present. In a water molecule, the formula is H2O, which means there are two hydrogen atoms and one oxygen atom. That gives two different elements, so there are two types of atoms. The total number of atoms is three (two hydrogens plus one oxygen), but the question asks for types, not total count. That’s why the correct choice is the one that reflects two types of atoms.

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