chemistry Final   when 2 or more elements are put together and their atoms change each other by hooking together when electrons are shared between 2 atoms when one atom takes more electrons for itself when a new thing (substance) is formed

1. compound

when 2 or more elements are put together and their atoms change each other by hooking together

2. shared electron bond

when electrons are shared between 2 atoms

3. unshared electron bond

when one atom takes more electrons for itself

4. chemical change

when a new thing (substance) is formed.
Example: a cake is formed when you mix eggs, flour, and sugar together and then bake it

5. physical change

when something changes from one state (form) to another.
Example: melting ice cream

6. solid

has a definite shape
does not take the shape of its container
atoms are packed closely together

7. liquid

does not have a definite shape
it takes the shape of its container
atoms are close together

8. gas

does not have a definite shape
takes the shape of its container
atoms are spread out and move around

9. Periodic Table

a table of chemical elements that is arranged in row, in order of atomic number (the number of protons)