# data[].attributes.headline
is determined by where the element is in the rows or columns that create a group or a period 

# data[].attributes.subject
is determined by where the element is in the rows or columns that create a group or a period 

# data[].attributes.headline
shows  a chemical bond formed between two ions opposite charges  

# data[].attributes.subject
shows  a chemical bond formed between two ions opposite charges  

# data[].attributes.headline
form the charge of the formula and that results in the charge  

# data[].attributes.subject
form the charge of the formula and that results in the charge  

# data[].attributes.headline
is determined by comparing the characteristics that includes gasoline taht it is called isooctane and heptane that is used for running cars  

# data[].attributes.subject
is determined by comparing the characteristics that includes gasoline taht it is called isooctane and heptane that is used for running cars  

# data[].attributes.headline
we can find a formula as seen on the web

# data[].attributes.subject
we can find a formula as seen on the web