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Electrical Theory Period 1 SAIT-Alberta > Composition of Matter > Flashcards

Flashcards in Composition of Matter Deck (17)
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1

What is a substance composed of only one type of atom called?

An element.

2

What is a substance composed of more than one type of atom called?

A compound

3

What is the smallest possible division of a compound?

A molecule

4

What are the four states of matter?

  • Solid
  • Liquid
  • Gas
  • Plasma

5

What is the major factor used in determining the conductivity of certain metals?

A low number of valence electrons (which are easier to "knock" free).

6

Typically, how many valence electrons will be present in the material for:

  1. A conductor
  2. An insulator
  3. A semiconductor

  1. 1-3
  2. 5+ 
  3. 4

7

Can energy or matter ever be created or destroyed?

No, only interchanged.

8

What is matter?

What are it's two properties?

Anything that has mass and occupies space.

Physical:

  • Touch
  • Sound
  • Smell
  • Sight
  • Taste

Chemical:

  • How it reacts to other substances

9

What is the most common form of matter in the universe?

Plasma.

10

What is a naturally occurring plasma seen on earth?

  • The northern lights
  • A lightning bolt
  • A flame
  • A fluorescent lamp.

11

What are two main particles found in the nucleus of an atom?

  • Protons
  • Neutrons.

12

How many protons and electrons does a neutral copper atom have?

29, with only one in it's fourth (valence) electron shell.

13

Opposite charges "_____", while like charges "_____".

Attract

Repel

14

Does a positive ion have an abundance or shortage of electrons?

Shortage.

15

What is the atomic number and atomic mass of copper?

Atomic #: 29

Atomic mass: 63.546 units

16

Is it possible to change matter from one state to another by using energy?

Yes.

17

What is a valence shell?

The outermost electron orbital shell of an atom.