The atomic mass of an element represents the ... Group of answer choices

1total mass of all its known isotopes.

2average mass of all its known isotopes.

3the total mass of the protons and neutrons.

4the average mass of the protons and neutrons.

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.