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Science > Density, Periodic Table & States of Matter > Flashcards

Density, Periodic Table & States of Matter Flashcards

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1
Q

What are valance electrons?

A
  1. The CONTROL the atom’s behavior
  2. They are most likely to react with other atoms
  3. They have HIGH ENERGY
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2
Q

What is Bohr’s Model?

A

Bohr’s model shows the shell’s energy levels + electrons AND the number of shells.

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3
Q

What is the definition of density?

A

Density: The degree of compactness of a substance.

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4
Q

Are liquids definite or indefinite in shape?

A

Liquids are INDEFINITE in shape!

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5
Q

Where are the valance electrons in an element?

A

On the OUTERMOST shell!

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6
Q

What are the 4 phases of matter?

A
  1. Less dense
  2. Density increases
  3. Spread of particles increases
  4. Spread of particles decreases
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7
Q

What are the units of density?

A

Millimeter (ML) or Centimeter (CM) cubed

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8
Q

How do you find the volume of a cylinder?

A

3.14 x radius squared x height!

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9
Q

How do particles move in a solid?

A

Particles are stuck together and they do not move much in a solid!

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10
Q

Does a gas have a definite or indefinite shape?

A

Gases have INDEFINITE shapes!

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11
Q

Does a solid have a definite or indefinite shape?

A

Solids have DEFINITE shapes!

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12
Q

How do you find VALANCE electrons?

A

Valance electrons are found by looking at what ROW/COLUMN the element is in!

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13
Q

What is density?

A

Density is how DENSE something is….DUH!

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14
Q

How do you calculate/find density?

A

Density= MASS % VOLUME

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15
Q

List the 4 states of matter.

A

The 4 states of MATTER:

  1. Plasma
  2. Gas
  3. Solid
  4. Liquid
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16
Q

Does a SOLID have a definite or indefinite VOLUME?

A

a SOLID has a DEFINITE Volume!

17
Q

How do you find the CM cubed?

A

L x W x H (length x width x height)!!!

18
Q

How do PARTICLES move in a LIQUID?

A

Particles are close together and they only move a little bit in a liquid!

19
Q

What does a LEWIS DOT diagram show?

A

A LEWIS DOT shows only the VALANCE ELECTRONS of an element!

20
Q

What does a STABLE ELEMENT need to have?

A

A Stable element needs to have a FULL OUTER SHELL!

21
Q

How do PARTICLES move in a GAS?

A

Particles are all moving a lot in a gas and they are SPREAD OUT, NOT stuck or close together!

22
Q

Does a GAS have a definite or indefinite VOLUME?

A

A GAS has an INDEFINITE VOLUME!

23
Q

Does a SOLID have a definite or indefinite VOLUME?

A

A SOLID has a DEFINITE VOLUME!

Science (2 decks)

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