In an orderly, repeating, three-dimensional pattern called a crystal lattice.
Answer:
A. wearing sunglasses to to protect eyes from UV rays
Explanation:
Your eyes are outside of your body, meaning external. All the other choices deal with internal organs.
Answer:
<u>K (Potassium) and Cl (Chlorine)</u>
Explanation:
Ionic bonds are formed with metals and nonmetals
Covalent bonds are formed only with nonmetals
Calcium and potassium are both metals
Sulfur and Chlorine are both nonmetals so they don't form ionic bonds
Carbon and Oxygen are both nonmetals so they don't form ionic bonds
B(; hope it helps if does thank me later
