Question

various atoms in the molecules of coumpounds are joined by​

Answer 1

Answer:

As mammals, toothed whales have to breathe air into their lungs. Other mammals can breathe through their mouth, or their nose, which sits right on top of it. In toothed whales, the nasal passage runs up above its eyes, creating a blowhole on top of its head. When it surfaces, it opens the blowhole to breathe.

Answer 2

Answer:

Various atoms in the molecules of compounds are joined by chemical bonds .

Explanation:

Chemical bonds are forces that hold atoms together to make compounds or molecules. Chemical bonds include covalent, polar covalent and ionic bonds.