Atomic Structure, Bonds And Reactions an der Cardiff University | Karteikarten & Zusammenfassungen

Lernmaterialien für Atomic structure, bonds and reactions an der Cardiff University

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What is a group/family on the periodic table?

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vertical column

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What is a period on the periodic table?

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horizontal row

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Define element

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composed of only one type of atom

cannot be broken down further

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What are the three key points of Dalton's atomic theory?

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all matter is made up of tiny particles called atoms

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Define heterogenous mixture

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components do not have a uniform composition throughout the sample


  • e.g. oil and water 
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Define chromatography

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different components of a liquid mixture separate as they move at different rates up the surface of a piece of chromatography paper

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Define compound

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consists of two or more elements always chemically combined in the same proportion

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How did the old periodic table system work?

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Representative elements had group numbers 1A to 8A

Transition elements have group numbers followed by the letter B

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Define homogenous mixture

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composition is uniform throughout the sample 


  • aka solution
  • e.g. air, seawater
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Define mixture

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two or more different substances that are physically mixed, but not chemically combined

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How do you calculate the atomic mass for an average atom?

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a weighted average of the masses of all the naturally occurring isotopes of that element

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Define pure substance

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Matter that has a fixed or definite composition

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Beispielhafte Karteikarten für deinen Atomic structure, bonds and reactions Kurs an der Cardiff University - von Kommilitonen auf StudySmarter erstellt!

Q:

What is a group/family on the periodic table?

A:

vertical column

Q:

What is a period on the periodic table?

A:

horizontal row

Q:

Define element

A:

composed of only one type of atom

cannot be broken down further

Q:

What are the three key points of Dalton's atomic theory?

A:

all matter is made up of tiny particles called atoms

Q:

Define heterogenous mixture

A:

components do not have a uniform composition throughout the sample


  • e.g. oil and water 
Mehr Karteikarten anzeigen
Q:

Define chromatography

A:

different components of a liquid mixture separate as they move at different rates up the surface of a piece of chromatography paper

Q:

Define compound

A:

consists of two or more elements always chemically combined in the same proportion

Q:

How did the old periodic table system work?

A:

Representative elements had group numbers 1A to 8A

Transition elements have group numbers followed by the letter B

Q:

Define homogenous mixture

A:

composition is uniform throughout the sample 


  • aka solution
  • e.g. air, seawater
Q:

Define mixture

A:

two or more different substances that are physically mixed, but not chemically combined

Q:

How do you calculate the atomic mass for an average atom?

A:

a weighted average of the masses of all the naturally occurring isotopes of that element

Q:

Define pure substance

A:

Matter that has a fixed or definite composition

Atomic structure, bonds and reactions

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