Which of the following Lewis symbols correctly represent that element? Select all that apply. Check all that apply.

. .
• N•
*
. .
Ca

.
•C•
*

. .
•Cl•
*

. .
:O:
* *

Answer is to avoid experimental error

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Is there an image with it