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1. What is the difference between an elemental molecule and a diatomic molecule?

Answer: Elemental molecule has 3 or more of the same element/atom. Diatomic molecule is only 2 of the same element/atom.

2. Which type of molecule is shown below? Why? Explain!

Answer: Elemental molecule because they are all the same atom and there are more than 3.

3. Describe the type of molecule shown by the pictures below. Explain why.

Answer: They are both molecular compounds because they have different elements/atoms bonded together.

4. Identify the following as a monoatomic element, molecular compound, diatomic

element, or elemental molecule.a. Cl2 - Diatomic

b. Ar - Monoatomicc. NH3 – Molecular Compound

d. S8 – Elemental Molecule

5. What do these two models have in common?

Answer: They are both diatomic because they show the same element/atom in pairs of two.

6. Describe a molecular compound.

Answer: Two or more different elements/atoms bonded together.

7. Look at the picture below. The yellow atoms represent Hydrogen (H) and the blue

atom represents Carbon (C). Explain why the chemical formula for this compound is CH4

Answer: There is only one Carbon atom shown and there are 4 Hydrogen atoms shown. The little 4 beside the H in the chemical formula tells me there are 4 atoms of Hydrogen.

8. Explain why this picture’s chemical formula is O3 AND explain what type of molecule this

is.

Answer: The formula is O3 because there are 3 Oxygen atoms in the molecule and it would be an elemental molecule.

9. Given the following chemical formulas, write the number of atoms of each element

present.a. NH3 – 1 Nitrogen (N); 3 Hydrogen (H)

b. CO2 – 1 Carbon (C); 2 Oxygen (O)c. H2O – 2 Hydrogen (H); 1 Oxygen (O)d. NaCl – 1 Sodium (Na); 1 Chlorine (Cl)

10. Explain what the following chemical formula and picture represent.

Answer: The formula would be written as N2 because there are two Nitrogen atoms bonded together which makes it a diatomic molecule.