Which is the only kind of orbital in the first energy level?
A. A d orbital
B. An f orbital
C. An s orbital
D. A p orbital

Which uses electromagnetic radiation to discover the properties and composition of bodies in space? space probe space station space shuttle space observatory

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.