Differentiate atoms, molecules, elements, and compounds - Middle School Physical Science

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Question

In the image, each circle represents an atom. Each different color of atom represents a different type of atom, and if two atoms are touching they are bonded together.

Screen shot 2020 05 19 at 2.33.58 pm

Given this information, this image represents:

Answer

The answer is “a mixture.” In this image we can see at least two types of atoms, so we know there is more than one element. The molecules in this image come in at least two varieties, so there must be at least two different compounds - meaning that this is a mixture.

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Question

A molecule is:

Answer

A molecule is defined as a group of any two atoms. When looking at a substance, this classification can be combined with element, compound, or mixture, but not with "an atom." So you can have a molecule of an element, a molecule of a compound, or several molecules of different varieties which create a mixture.

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Question

An element is:

Answer

A molecule is defined as a group of a the same kind of atom. When looking at a substance, this classification can be combined with either atoms or molecules. So you can have either an atom of an element, or molecule of an element- as long as there is only one type of atom present. If there is more than one kind of atom present, then you have either a compound, or a mixture.

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Question

"NaCl" is the chemical symbol for salt. Salt is an example of:

Answer

Salt is a compound because it has more than one type of element. Na is the chemical symbol for Sodium. and Cl is the chemical symbol for Chlorine. These elements are bonded together to form a compound, Sodium Chloride.

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Question

"H" or "Hydrogen" is an example of:

Answer

Hydrogen is an element with the atomic number 1. You can find Hydrogen on the periodic table.

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Question

A mixture is:

Answer

A mixture is a group of different atoms or molecules. Mixtures contain several elements that are not bonded together.

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Question

Carla is working on a science project using several different household materials. She has a bowl of sugar, a glass of milk, a handful of rocks, and a few coins. While she is not looking, her younger sister pours all of her materials into a a bowl together and stirs them up. The sugar dissolves in the milk, but everything else stays the same. What did Carla's sister create?

Answer

Carla's sister made a mixture because these items are different compounds and will not combine chemically. Even though the sugar dissolves into the milk, the solution is not the result of a chemical reaction.

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Question

In the image, each circle represents an atom. Each different color of atom represents a different type of atom, and if two atoms are touching they are bonded together

Screen shot 2020 05 19 at 2.33.41 pm

Given this information, this image represents:

Answer

The answer is “a compound.” Compounds are groups of atoms of two or more elements. The image cannot be a single element because there is more than one type of atom present. The image cannot be a mixture because there is only one kind of molecule present. The image cannot be a single molecule because each group of atoms is a molecule.

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Question

In the image, each circle represents an atom. Each different color of atom represents a different type of atom, and if two atoms are touching they are bonded together.

Given this information, this image represents:

Screen shot 2020 05 19 at 2.33.47 pm

Answer

The answer is “an element.” This image is an element because there is only one kind of atom present.

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Question

In the image, each circle represents an atom. Each different color of atom represents a different type of atom, and if two atoms are touching they are bonded together.

Screen shot 2020 05 19 at 2.33.52 pm

Given this information, this image represents:

Answer

The answer is “an element.” This image is an element because there is only one kind of atom present. Even though the atoms are bonded in molecules, there is still only one kind of atom in the image. Therefore, it could not be a compound or a mixture.

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Question

In the image, each circle represents an atom. Each different color of atom represents a different type of atom, and if two atoms are touching they are bonded together

Screen shot 2020 05 19 at 2.33.41 pm

Given this information, this image represents:

Answer

The answer is “a compound.” Compounds are groups of atoms of two or more elements. The image cannot be a single element because there is more than one type of atom present. The image cannot be a mixture because there is only one kind of molecule present. The image cannot be a single molecule because each group of atoms is a molecule.

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Question

In the image, each circle represents an atom. Each different color of atom represents a different type of atom, and if two atoms are touching they are bonded together.

Given this information, this image represents:

Screen shot 2020 05 19 at 2.33.47 pm

Answer

The answer is “an element.” This image is an element because there is only one kind of atom present.

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Question

In the image, each circle represents an atom. Each different color of atom represents a different type of atom, and if two atoms are touching they are bonded together.

Screen shot 2020 05 19 at 2.33.52 pm

Given this information, this image represents:

Answer

The answer is “an element.” This image is an element because there is only one kind of atom present. Even though the atoms are bonded in molecules, there is still only one kind of atom in the image. Therefore, it could not be a compound or a mixture.

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Question

In the image, each circle represents an atom. Each different color of atom represents a different type of atom, and if two atoms are touching they are bonded together.

Screen shot 2020 05 19 at 2.33.58 pm

Given this information, this image represents:

Answer

The answer is “a mixture.” In this image we can see at least two types of atoms, so we know there is more than one element. The molecules in this image come in at least two varieties, so there must be at least two different compounds - meaning that this is a mixture.

Compare your answer with the correct one above

Question

A molecule is:

Answer

A molecule is defined as a group of any two atoms. When looking at a substance, this classification can be combined with element, compound, or mixture, but not with "an atom." So you can have a molecule of an element, a molecule of a compound, or several molecules of different varieties which create a mixture.

Compare your answer with the correct one above

Question

An element is:

Answer

A molecule is defined as a group of a the same kind of atom. When looking at a substance, this classification can be combined with either atoms or molecules. So you can have either an atom of an element, or molecule of an element- as long as there is only one type of atom present. If there is more than one kind of atom present, then you have either a compound, or a mixture.

Compare your answer with the correct one above

Question

"NaCl" is the chemical symbol for salt. Salt is an example of:

Answer

Salt is a compound because it has more than one type of element. Na is the chemical symbol for Sodium. and Cl is the chemical symbol for Chlorine. These elements are bonded together to form a compound, Sodium Chloride.

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Question

"H" or "Hydrogen" is an example of:

Answer

Hydrogen is an element with the atomic number 1. You can find Hydrogen on the periodic table.

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Question

A mixture is:

Answer

A mixture is a group of different atoms or molecules. Mixtures contain several elements that are not bonded together.

Compare your answer with the correct one above

Question

Carla is working on a science project using several different household materials. She has a bowl of sugar, a glass of milk, a handful of rocks, and a few coins. While she is not looking, her younger sister pours all of her materials into a a bowl together and stirs them up. The sugar dissolves in the milk, but everything else stays the same. What did Carla's sister create?

Answer

Carla's sister made a mixture because these items are different compounds and will not combine chemically. Even though the sugar dissolves into the milk, the solution is not the result of a chemical reaction.

Compare your answer with the correct one above

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