Question

1. who developed the periodic table? (look it up!) 8. each box on the periodic table represents one ___________. 9. the smallest unit of each element is the ___________.

Explanation:

• For question 7, Dmitri Mendeleev is widely credited with developing the first widely - recognized periodic table.
• For question 8, each box on the periodic table represents one element.
• For question 9, the smallest unit of an element is the atom.

Answer:

1. Dmitri Mendeleev
2. Element
3. Atom