* Nitrogenous bases: These are the building blocks of DNA and RNA, and there are five main types:

* Adenine (A)

* Guanine (G)

* Cytosine (C)

* Thymine (T) - found only in DNA

* Uracil (U) - found only in RNA

* Sugar: This is a five-carbon sugar, either deoxyribose in DNA or ribose in RNA.

* Phosphate group: This is a negatively charged group that links the sugars together to form the backbone of the nucleic acid molecule.

So, the specific atoms that make up nucleic acids include:

* Carbon (C)

* Hydrogen (H)

* Oxygen (O)

* Nitrogen (N)

* Phosphorus (P)

These atoms are arranged in specific ways to form the building blocks of DNA and RNA.