Atoms and Molecules: Structure and Types
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Questions and Answers

Which type of molecule has a straight shape?

  • Linear molecules (correct)
  • Tetratomic molecules
  • Angular molecules
  • Triatomic molecules

What is the main difference between atoms and molecules?

  • Atoms are not bonded together, while molecules are bonded together. (correct)
  • Atoms exist independently, while molecules cannot exist independently.
  • Atoms are made up of protons, neutrons, and electrons, while molecules are made up of only protons and electrons.
  • Atoms are the basic building blocks of elements, while molecules are the basic building blocks of compounds.

Which statement about polymolecules is correct?

  • Polymolecules are always linear in shape.
  • Polymolecules are made up of atoms of different elements.
  • Polymolecules are made up of several atoms of different elements.
  • Polymolecules are made up of several atoms of the same element. (correct)

What category do molecules with four atoms belong to?

<p>Tetratomic molecules (C)</p> Signup and view all the answers

What is the fundamental difference between atoms and molecules?

<p>Atoms are the smallest units of matter that can exist independently, while molecules are formed by the bonding of atoms. (A)</p> Signup and view all the answers

Which type of atoms are considered stable?

<p>Atoms with an equal number of electrons and protons (B)</p> Signup and view all the answers

What is the main difference between homomolecules and heteromolecules?

<p>Homomolecules are made up of a single type of atom, while heteromolecules are made up of different types of atoms. (D)</p> Signup and view all the answers

What is the primary role of neutrons in an atom?

<p>To provide stability to the atom (A)</p> Signup and view all the answers

Flashcards

What are atoms?

Atoms are the smallest units of matter that can exist independently. They are the building blocks of elements.

What are the three main types of particles found in an atom?

The three main types of particles in an atom are protons (positively charged), neutrons (neutral), and electrons (negatively charged).

What makes an atom stable?

An atom is stable when it has an equal number of protons and electrons. This means it has a balanced charge.

What are molecules?

Molecules are formed when two or more atoms bond together. They can be made up of the same type of atoms or different types.

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Explain the difference between homomolecules and heteromolecules.

Homomolecules are made up of only one type of atom, like O2 (oxygen gas), while heteromolecules are made up of different types of atoms, like H2O (water).

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What is a linear molecule?

A linear molecule has a straight shape. Imagine a line with atoms spaced out on it.

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What is an angular molecule?

An angular molecule has a bent shape. Imagine atoms connected in a V shape.

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What is the key difference between atoms and molecules?

Atoms are the basic building blocks, while molecules are formed when atoms bond together. Atoms are individual, while molecules are groups.

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Study Notes

Atom and Molecules

Introduction

Atoms and molecules are fundamental units of matter and are essential to understand the properties and behavior of substances. Atoms are the basic building blocks of elements, while molecules are formed when atoms of one or more elements bond together. In this article, we will discuss the structure of atoms, types of atoms, types of molecules, and the difference between them.

Atoms

Atoms are the smallest units of matter that are capable of independent existence and can only be divided in whole number of particles. There are three main types of atoms:

  1. Protons: Positively charged particles, found in the nucleus of an atom.
  2. Neutrons: Neutral particles, also found in the nucleus of an atom.
  3. Electrons: Negatively charged particles that orbit the nucleus of an atom.

Types of Atoms

Atoms can be categorized into two types based on their structure:

  1. Unstable Atoms: Atoms that have a different number of protons and electrons can be unstable due to the excess or deficit of electrons.

  2. Stable Atoms: Atoms that have an equal number of electrons and protons are stable, meaning they cannot be further broken down.

Molecules

Molecules are formed when atoms of one or more elements bond together through a process called chemical bonding. There are three main types of molecules:

  1. Homomolecules: Molecules made up of the same type of atoms.
  2. Heteromolecules: Molecules made up of different types of atoms.
  3. Polymolecules: Molecules made up of several atoms of the same element.

Types of Molecules

Molecules can be categorized into four main types based on their shape:

  1. Linear molecules: Molecules with a straight shape, such as CO and N2.
  2. Angular molecules: Molecules with an angular shape, such as BF3 and SO2.
  3. Triatomic molecules: Molecules with three atoms, such as CO2 and H2O.
  4. Tetratomic molecules: Molecules with four atoms, such as CH4.

Difference between Atoms and Molecules

The main difference between atoms and molecules lies in their structure and composition:

  • Atoms: Atoms are the basic building blocks of elements, made up of protons, neutrons, and electrons.
  • Molecules: Molecules are formed when atoms of one or more elements bond together, resulting in a larger unit.

Conclusion

Atoms and molecules are fundamental units of matter that play a crucial role in understanding the properties and behavior of substances. By understanding their structure, types, and differences, we can gain a deeper insight into the world around us.

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Explore the fundamental units of matter - atoms and molecules, and their structure, types, and differences. Gain a deeper insight into the world of chemistry and the building blocks of substances.

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