One of the 4 nucleic acids that make up dna. It is purine derived & pairs with thymine.
It would have 20 protons, 20 neutrons, and 20 electrons. Protons and electrons are USUALLY (I say usually because of the different types of atoms) the same as the atomic number. To find neutrons you take the atomic mass minus the atomic number. 40-20=20
A. Decreasing amount of energy needed to start a reaction.
Definition-
Real property ,the expansion, redevelopment, pollutant, or contaminant.
They can be located anywhere and can be very small
