Video , Question and Answer : Elements vs Compounds

What is an element?

• A pure substance that cannot be broken down into a simpler substance

• A substance made of two or more elements

• A compound with a specific ratio of elements

• A mixture of different atoms

What is an atom made up of?

• Proton, neutron, and electron

• Proton, electron, and photon

• Proton, neutron, and positron

• Neutron, electron, and photon

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What is a compound?

• A pure substance of only one type of atom

• A mixture of different elements

• A substance that can be broken down into simpler substances

• A pure substance of two or more elements chemically combined

What is the ratio of hydrogen to oxygen in water?

• 4:1

• 3:1

• 2:1

• 1:1

What is glucose made of?

• Sodium and chlorine

• Carbon, hydrogen, and oxygen

• Hydrogen and chlorine

• Carbon and oxygen

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An ​ (a)   is a pure substance. In other words, an element cannot be broken down into a simpler substance ​ (b)   means.An element is made up of only one type of ​ (c)   .

• element
• by physical or chemical
• atom

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A ________ is a pure substance of two or more elements chemically combined. Elements combine during a chemical change. A particle of a compound is called a molecule.

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Which of the following is a characteristic property of compounds?

• • a) They can be separated into their constituent elements by physical means.

• • b) They have a fixed ratio of elements.

• • c) They have a neutral charge.

• • d) They can exist in any state of matter.

Compounds are made up of two or more different elements chemically bonded together.

• True

• False

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NGSS.MS-PS1-1

The properties of a compound are always different from the properties of the elements that make it up.

• True

• False

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