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Science > Elements and Compounds > Flashcards

Elements and Compounds Flashcards

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1
Q

State what an atom is.

A

The smallest part of an element that can exist.

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2
Q

State what a compound is.

A

Pure substances made up atoms of two or more elements strongly joined together.

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3
Q

What is an element?

A

Substances that contain only one type of atom.

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4
Q

What is the difference between a compound and a mixture?

A

A compound is a pure substance made up of atoms of two or more elements strongly joined together; a mixture is a combination of molecules of different atoms and/or compounds jumbled up together and not chemically joined together.

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5
Q

What is a molecule?

A

A group of two or more atoms strongly joined together.

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6
Q

Name the compound with the formula NO and write down how many of each element are present in the compound.

A

Nitrogen monoxide; one nitrogen, one oxygen.

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7
Q

What is the chemical formula for carbon dioxide? How many of each element are there in the compound?

A

CO2 one carbon, 2 oxygen atoms.

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8
Q

What is the name of the compound that contains one sulfur atom and 2 oxygen atoms?

A

sulfur dioxide.

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9
Q

What is the name of the compound with the formula ZnO?

A

zinc oxide

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10
Q

What is the name of the compound with the formula NaCl?

A

sodium chloride

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11
Q

What is the name of the compound with the formula MgS?

A

magnesium sulfide

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12
Q

What is the name of the compound with the formula CuCO3 ?

A

copper carbonate

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13
Q

What is the name of the compound with the formula CaSO4 ?

A

calcium sulfate

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14
Q

What is the name of the compound with the formula KNO3 ?

A

potassium nitrate

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15
Q

Name the number of each element in the compound with the formula CuCO3 .

A

1 copper, 1 carbon, 3 oxygen.

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16
Q

Name the number of each element in the compound with the formula CaSO4 .

A

1 calcium, 1 sulfur, 4 oxygen.

17
Q

Name the number of each element in the compound with the formula KNO3 .

A

I potassium, 1 nitrogen, 3 oxygen

18
Q

Complete the sentence: All the atoms of an element are ______.

A

the same

19
Q

Complete the sentence: All the molecules in a compound are ______.

A

the same

20
Q

True or false: The properties of a compound are the same as the properties of its elements.

A

False.

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