2. The most useful property of metalloids is their a. Varying ability to conduct electric current.
b. Softness and malleability.
c. Tendency to be unreactive.
d. Ability to be pulled out into long wires.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.