Chemistry Regents Exam Review HW 4 (Periodic Table)

What was the primary reason Mendeleev's mother reopened the glassmaking factory?

• To become a renowned glassmaker

• To earn money for Mendeleev's education

• To start a new family business

• To rebuild the town's economy

What did Mendeleev realize about the elements that differed from sorting by atomic weight?

• Their properties were periodic

• They were all gases

• They could not combine with other elements

• Their weights were incorrect

What did Mendeleev predict about the missing elements in his periodic table?

• Their color and state at room temperature

• Their properties and existence

• Their reactivity with water

• Their exact atomic weights

Why was de Chancourtois' periodic table design largely ignored?

• It was incorrect

• It was too complex to print

• It lacked scientific data

• It was similar to Mendeleev's

What fundamental particle was discovered that explained the periodicity of elements?

• The proton

• The neutron

• The electron

• The photon