Answer:different elements have different number of electrons and shells/orbits thatswhy it have different atomic mass and size.
Explanation:
Answer: it's part of the immune system that focuses on specific foreign particles. Rather than generically attack any antigens, T cells circulate until they encounter their specific antigen. As such, T cells play a critical part in immunity to foreign substances !
Explanation:
Answer:
Na + CaSO4 = Na2SO4 + Ca
Explanation:
single displacement (substitution)
A transverse and longitudinal wave combine to form a Water Wave.
