What kind of bond holds amino acids together?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount