Chem 103 Module 2 Questions and Correct Answers/ Latest Update / Already Graded

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Chem 103 Module 2 Questions and Correct
Answers/ Latest Update / Already Graded
Water in solid state

Ans: Move fast, stay vlose together but dont touch


When water is heated it clumps

Ans: Together more


When water is heated above boiling it

Ans: Moves far apart and moves very fast


Solid

Ans: Close together in clump in center


Liquid

Ans: Fill bottom of container


Gas

Ans: Move all around container

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When water is cooled the molecules

Ans: Only wiggle and not spin


Gas:

Ans: Molecules are far apart and move a lot


Neon and argon are

Ans: More dense in solid form


Water is weird because

Ans: - it's solid form is less dense than it's liquid from
- all 3 states are found at naturally occurring temps on earth


Physical change

Ans: No bonds are broken or formed. The same substance is
there after the change.


Chemical change


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Ans: The bonds break apart and the atoms rearrange into new
substances with new chemical bonds


K

Ans: Element symbol


Ag

Ans: Element symbol


208

PB

82. The 208 is the

Ans: Mass number


Mass number =

Ans: Protons + electrons


208

Pb

82. The 82 is
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