Which object has unbalanced forces acting on it? Question 2 options:

a sweater sitting on a store shelf

a letter sitting in a mailbox

a fence around a garden

a leaf falling to the ground

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

What can be found in the ionosphere