The information you want is in your query, except it's hard to decode. For example, this:
"P246": [
{
"id": "q568$E47B8CE7-C91D-484A-9DA4-6153F132997D",
"mainsnak": {
"snaktype": "value",
"property": "P246",
"datatype": "string",
"datavalue": {
"value": "Li",
"type": "string"
}
},
"type": "statement",
"rank": "normal",
"references": …
}
]
means that the “element symbol” (property P246) is “Li”. So, you will need to read all the properties from your query and then find out the name for each of the properties you found.
To get just the statements, you could also use action=wbgetclaims
, but it's in the same format as above.