Write the correct formula for the compound formed by each of the following pairs of ions. 1.) ni^2+, so4^2- 2.) al^3+, o^2- 3.) ca^2, clo3- 4.) nh4+, p^3- 5.) cu+, no3-

1.) NiSO₄; 2.) Al₂O₃; 3.) Ca(ClO₃)₂; 4.) (NH₄)₃P; 5.) CuNO₃

 Step-by-step explanation:

We can use the criss-cross method to work out the formulas. The steps are

If we use this method, the formula for the compound formed from Na⁺, SO₃²⁻ becomes Na₂SO₃.

1.) Ni²⁺ +  SO₄²⁻  ⟶ Ni₂(SO₄)₂ ⟶ NiSO₄

2.) Al³⁺ +  O²⁻     ⟶  Al₂O₃

3.) Ca²⁺ + ClO₃⁻ ⟶ Ca(ClO₃)₂  

4.) NH₄⁺ + P³⁻    ⟶ (NH₄)₃P  

5.) Cu⁺ + NO₃⁻   ⟶ CuNO₃

it is stable as it is in group 0 which have full outer shells of electrons

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.