Question

1. choose the best answer. what made mendeleevs periodic table different from the prior versions published by other scientists? elements were organized according to increasing atomic mass. the patterns of an elements properties were unpredictable. he arranged elements in vertical columns. there were no gaps in his periodic table. 6) choose the best answer. what model did mendeleev and meyer use to help construct the periodic table? the plum pudding model rutherfords model daltons atomic model bohrs model

Explanation:

• For question 5: Mendeleev's periodic table was different because elements were organized according to increasing atomic mass. Other scientists also had vertical columns (e.g., Newlands' Law of Octaves had some form of grouping). Mendeleev's table had gaps (for predicted elements). The patterns of element properties in his table were predictable.
• For question 6: Dalton's atomic model (which proposed that atoms are indivisible, elements are made of atoms, etc.) was used as a basis. The plum - pudding model (Thomson's, about electrons in a 'positive soup') came later. Rutherford's model (nucleus with electrons around) and Bohr's model (quantized electron orbits) also came after Mendeleev and Meyer's work on the periodic table.

Answer:

1. Elements were organized according to increasing atomic mass.
2. Dalton's atomic model.