11- Antiparticles look and behave just like their corresponding matter particles, except they have opposite charges.
12- For instance, a proton is electrically positive whereas an anti-proton is electrically negative.
13- It behaves just the same as matter —No difference
14- Gravity affects matter and antimatter the same way because gravity is not a charged property.
15- Matter particle has the same mass as its antiparticle.