1) which of the following is the least reactive? alkali metals alkaline-earth metals noble gases 2)which describes how elements are arranged in the periodic table? z by chemical symbol by increasing atomic number by alphabetical order of name 3)which of the following groups have a complete set of electrons in their outer shell? alkaline-earth metals halogens noble gases 4)from the results of his experiments, moseley was able to determine the number of in an atom. protons neutrons electrons 5)mendeleev arranged the elements in order of increasing atomic mass alphabetically randomly

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.