Name three things that are matter and why

How many neutrons does a atom of cobalt have?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)