The answer is (3) Ca3(PO4)2, which is insoluble due to its attraction force between the particles being higher than its attraction force to water molecules.
Answer:
Electrons
Explanation:
Atoms both have negative and positive particles
Protons are positive
Electrons are negative
Neutrons are neutral
Nuclei is where you find both neutrons and protons in an atom
( 5) direction should same in first than opposite in last
Isnt the basic particle that all elements are made of electrons because i know that you can get isotopes which is a whole different subject