Questions

Isotopes are atoms of the same element that have different mass numbers.

Example : Hydrogen, Deutirium and tritium all these have different mass but same atomic numbers.

The three major amendments that were passed shortly after the Civil War are the reconstruction amendments that were the 13th, 14th, and 15th amendments.

The 13th Amendment abolished slavery,

The 14th granted African American citizenship and equal protection before the law, (and)

The 15th Amendment attempted to secure the right to vote for newly freed slaves. 

Addis Ababais the capital ofEthiopia.Birris the currency ofEthiopia.Note:1.Yerevanis the capital ofArmenia.2.Minskis the capital ofBelarus.3.Phnom Penhis the capital of Cambodia.4.Nicosiais the capital ofCyprus.