# Problem: Which of the following correctly represent the placement of electrons around each atom? Drag each item to the appropriate Bin.

###### FREE Expert Solution

Recall that when becoming an ion, the element tries to achieve the configuration of the nearest noble gas.

For NaF:

Na (metal) + F (nonmetal) → ionic compound

For Na: The nearest noble gas is Ne and we can see that Na has 1 more electron than Ne. This means it needs to lose 1 electron to achieve a noble gas configuration and in doing so becomes Na+.

Na → Group 1A → 1 valence electrons

Na+ → will lose the 1 valence electron

For F: The nearest noble gas is Ne and we can see that I has 1 less electron than Ne. It needs to gain 1 electron to become F.

F → Group 7A → 7 valence electrons

F → will gain 1 electron → total of 8 electrons (represented by dots and enclosed in bracket)

The correct placement of electrons for NaF is:

For CaBr2:

94% (85 ratings)
###### Problem Details

Which of the following correctly represent the placement of electrons around each atom? Drag each item to the appropriate Bin.