An amino group is weakly basic and includes a(n) atom covalently bonded to two hydrogen atoms.

Answer is Nitrogen atom.

Explanation: Amino groups are the functional groups in which Nitrogen atom is attached to hydrogen atoms, alkyl groups, aryl groups or the combination of these three. The Compounds that contain Amino group as a functional group is known as Amine.

Amines are classified as : Primary (1°), Secondary (2°), Tertiary(3°) and Quaternary (4°)

Primary amino groups are the ones in which Nitrogen atoms is covalently attached to 2 H-atoms and 1 alkyl or aryl group.

Secondary amino groups are the ones in which Nitrogen atom is covalently bonded to 1 H-atom and two alkyl or aryl groups.

Tertiary amino groups are the ones in which Nitrogen atom is covalently attached to only 3 alkyl or aryl groups.

Quaternary amino groups are the ones in which Nitrogen atom is covalently attached to 4 alkyl or aryl groups forming an ammonium salt.

The Atom which is covalently bonded to 2 H-atoms is Nitrogen atom.

hloride, what is the mass of calcium in

explanation:

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."