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Electrical Theory > Unit 1: Atomic Theory > Flashcards

Unit 1: Atomic Theory Flashcards

1
Q

What is AC and DC?

A

Alternating Current(bidirectional) and Direct Current (unidirectional)

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2
Q

What is the basic building block of the universe and the smallest part of an element?

A

The atom

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3
Q

Matter is a combination of atoms. True or False?

A

True

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4
Q

What are the 3 states that matter can exist?

A

Solid, Liquid or Gas

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5
Q

An element is a substance that cannot be divided into two or more simpler substances. True or False?

A

True

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6
Q

What are the tree principal parts of a atom?

A

Proton, Neutron and Electron

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7
Q

What is the nucleus of an atom made of?

A

Protons and Neutrons

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8
Q

The atomic number of an element is the same number of protons in its nucleus.

True or False?

A

True

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9
Q

What happens if two objects if likely forces come close to each other?

A

The will repel each other

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10
Q

What happens if two objects if unlikely forces come close to each other?

A

They will attract each other

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11
Q

How many electrons can the fourth shell hold max?

A

32

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12
Q

How many electrons can the 1, 2 and 3 shell hold max?

A

1= 2, 2= 8 and 3= 18

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13
Q

What do we call the electrons located at the valence shell?

A

Valence Electrons

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14
Q

Atoms with up to 3 valence electrons are considered really good conductors, true or false?

A

True

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15
Q

How many electrons can the valence shell hold?

A

8 max

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16
Q

What is electricity?

A

Electricity is the flow of electrons

17
Q

How does current flow is produced? Witch theory states that?

A

The bump theory, the electrons produce current flow when they kick each other out of the atom’s valence shell.

18
Q

Are materials that are neither good conductors nor good insulators. They usually have 4 electrons in the valence shell. The conductivity changes based on the temperature, when it is very hot

A

Semiconductors

19
Q

What a molecule is?

A

Is the smallest part of a compound

20
Q

What are insulators?

A

Materials that provides a really difficult path for the current to flow

21
Q

How many valence electrons do insulators usually have?

A

7-8 valence electrons

22
Q

Six basic methods for producing electricity are magnetism, chemical action, light, heat, pressure,
and friction. True or False?

A

True

23
Q

Five basic effects that can be caused by electricity are magnetism, chemical reactions, light, heat,
and pressure. True or False?

A

True

Electrical Theory (5 decks)

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