Parts of a nucleotide

What are the 3 parts of a nucleotide?  What is different between ATP and dATP in terms of molecular formula

Same as ATP, the three structural components of dATP are the adenine base, phosphate groups, and the pentose sugar. Here also, the adenine base attaches to the 1′ position of the pentose sugar. But, the pentose sugar in the dATP is deoxyribose. It does not consist of a 2’hydroxyl group.