1. Употребите глагол в одной из форм группы Simple 1)We(to call)

1. We call these simple substances elements.
2. Every atom has a center or nucleus.
3. Radium is one of them.
4. About 30 years ago scientists found a way of splitting atoms artificially and making then give off energy.
5. In some years we will know about them only from the way they act.  
6. Are atoms too small to be seen with powerful microscopes? Atoms are not too small to be seen with powerful microscopes.
7.  Can atoms of oxygen and atoms of hydrogen join to form water?  Atoms of oxygen and atoms of hydrogen can not join to form water.
8.  Are atoms made up of even smaller particles? Atoms are not made up of even smaller particles.
9.  Does every atom have a center or nucleus? Every atom does not have a center or nucleus.
10. Can atoms of different kinds join together in different ways. Atoms of different kinds can not join together in different ways.