What compound does Br- and Aluminum ion make?also: Fe2+ and an Oxide ion?Question 2:An element's most stable ion forms an ionic compound with bromine, having the formula XBr2If the ion of element X has a mass number of 230 and has 86 electrons, what is the identity of the element, and how many neutrons does it have?element?number of neutrons?thanks in advance
What compound does Br- and Aluminum ion make? ANSWER: AlBr3 also: Fe2+ and an Oxide ion? ANSWER: FeO Question 2: An element's most stable ion forms an ionic compound with bromine, having the formula XBr2If the ion of element X has a mass number of 230 and has 86 electrons, what is the identity of the element, and how many neutrons does it have? element? number of neutrons? ANSWER: (1)Element X is Radium (Ra)ANSWER: (2)Number of neutrons is 142 Rationale: Since element X forms the compound XBr2, it means that it has a 2+ chargeThe number of electrons in the ion form is 86 so, number of protons is 2 more than the number of electronsThe number of protons is therefore, 88From the periodic table, this is the element RadiumThe mass number is 230, which is the sum of protons and neutrons So, difference between the mass number and number of protons is the number of neutronsnoof neutrons 230 - 88 142.
