________construction includng lines and circle and their properties had been developed by humans ever since early ages.

Which of the following is a GTK-based chemical structures drawing program?

__________ is a 3D astronomy program 

___ is an application software for the study of chemistry. That is different clements etc.

____________tool used to control the lengths of lines,the angle sizes etc.

_________, a cool little game where kids build molecules out of atoms 

_________calculates elemental compositon and molecular weight of compounds from their chemical formula.

_____ is an utility software used to design chemical reactions, molecaler structure etc.

__________is a software application that delineates the countries experiencing day or night at a given time on a world map using light and shade.