Judging by your question, it seems that 1 positive ion of A will bond to 1 negative ion of T. Thus, only ionic bonding can form.
However, if you were talking about covalent bonding, then there can be different number of bonds. If both atoms are in group VI, then there will be 2 sets of 2 electrons being shared in the covalent bond, which makes it double bond. But if you are talking about group VII, then it will be 1 set of 1 electron from each atom, which makes it a single bond.
C-C sigma bonds in acetone : 2 C-H bonds in water : 0 C-O bonds in water : 0 C-O sigma bonds in propanol : 1 C-C pi bonds in methanol : 0
there are 4 bonds
Five sigma bonds.
there are 97 sigma bonds and 11 pi bonds
BaBr2 has two ionic bonds, but no covalent bonds.
There are four bonds. All are C-H bonds
12 single bonds, 4 double bonds
26 sigma bonds
2
12 sigma bonds.
sigma bonds=9 and pi bonds=2
13 sigma bonds and 0 pi bonds