Ascientist is examining an unknown solid. which procedure would most likely determine a chemical property of the substance? heating it to find the temperature at which it melts exposing it to a flame to see if it catches on fire hitting it with a hammer to determine if it breaks or bends placing it in water to find out whether or not it dissolves

It is B because with fire there is always a reactin and a physical change.

The answer is:

exposing it to a flame to see if it catches on fire.

The explanation:

- let's discuss all the choices to figure out the correct one :

1) the first one when we heat the solid to find the temperature at which it melts we here talking about a melting point ,and this is a physical property.

2) the third answer hitting it with a hammer to determine if it breaks or bends,

we here talking about ductility and the ductility is a physical property.

3) The fourth answer placing it in water to find out whether or not it dissolves, we here talking about solubility, and the solubility is one of a physical properties also.  

4) so, the right answer will be( B) exposing it to a flame to see if it catches on fire because we are talking here  about the flammability and this is a chemical property.

when the chemical property is when the identity of the material changes for example flammability and toxicity.

and the physical properties are like density , shape , melting point , solubility  

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

there are no atoms