1. A is a solid, naturally formed substance that always has the some composition and the same properties

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Draw the lewis dot structure for each of the following polyatomic ions

How does blood clotting prevent the entry of pathogens through cuts and wounds? answer asap,, this is due tomorrow. will mark as brainliest or whatever you call it : )