Respuesta :

Answer:

$1A

Step-by-step explanation:

The elements of a formula only can have the following format:

1) Letter Number as C1

2) Letter $ Number as A$1

3) $ Letter Number as $A1

4) $ Letter $ Number as $A$1

The element $1A is not in the format

Answer:

$1A

Step-by-step explanation:

It's correct on Plato