Question

which elements did mendeleev change the atomic mass of to better match the priority of periodicity? (choose all that apply)
□ be- beryllium
□ in- indium
□ na- sodium
□ au- gold
□ k- potassium
□ li- lithium
□ kr- krypton

Explanation:

Mendeleev adjusted the atomic - mass values of beryllium (Be) and indium (In) to fit the periodicity of the elements in his periodic table. He suspected that the previously - accepted atomic masses were incorrect based on the properties and positions of these elements relative to others in the table.

Answer:

Be - Beryllium, In - Indium