Together, which ions form hydroxyapatite crystals of osseous tissue? Chemistry Chemical Reactions Review of Elements and Compounds 1 Answer anor277 Aug 27, 2017 Are these not #"calcium, phosphate, and hydroxyl ions......."# Explanation: #"Hydroxylapatite,"# #Ca_5(PO_4)_3(OH)#, is a neutral salt, and contains #5xxCa^(2+)+3xx(PO_4)^(3-)+HO^-# ions, i.e. a neutral charge as required. Answer link Related questions Question #f13ae Question #bb7b1 Question #78896 Question #fd74b Question #f13b2 How do I find the molar mass of an element? What is an element? What are some common mistakes students make with elements? What are some examples of compounds? How are compounds formed? See all questions in Review of Elements and Compounds Impact of this question 2173 views around the world You can reuse this answer Creative Commons License