Write correct molecular formula formed from following ions and name the compound. K+ and ClO- formula: name:

K+ and ClO4- formula: name:

Ca2+ and PO43- formula: name:

Al3+ and SO32- formula: name:

Na+ and H- formula: name:

Fe3+ and Cl- formula: name:

Mn2+ and O2- formula: name:

NH4+ and SO42- formula: name:

Ca2+ and NO3- formula: name:

Ca2+ and NO2- formula: name:

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.