Question

which of these is the smallest? (hint...we learn about them in our first unit!) an atom a cell a grain of salt a water droplet question 4 which element has the chemical symbol \au\ — often associated with treasure? (hint - you can look at a periodic table online to help you! periodic table) gold silver copper aluminum

Explanation:

First Question (Which of these is the smallest?):

To determine the smallest among an atom, a cell, a grain of salt, and a water droplet, we analyze their sizes:

• An atom is the basic unit of matter, extremely small (on the order of \(10^{-10}\) meters).
• A cell is a biological unit, much larger than an atom (typically micrometers in size).
• A grain of salt and a water droplet are macroscopic objects, much larger than both atoms and cells.

So, the atom is the smallest.

From the periodic table, the chemical symbol "Au" corresponds to the element Gold (derived from the Latin word "Aurum"). Silver is "Ag", Copper is "Cu", and Aluminum is "Al".

Answer:

A. An atom

Second Question (Which element has the chemical symbol "Au"?):