Answer:
Same number of protrons, and different number of neutrons :)
1) false called atoms
2) true
3) false atoms of the same element have the same mass while thise of different elements have different mass
4) true
5) true
6) false a new compound is formed
7) true
8) false from different elements
9) false can not be broken down
10) false more mass (not sure)
Answer:
Ca + AlCl3 = CaCl2 + Al - chemical equation balancer.
Explanation: