Question

besides gallium which two other elements have since been discovered that fill the gaps left by Mendeleev in creating his periodic table?​

Answer 1

Answer:

Two other other elements are scandium and germanium. In their gap, the the elements with names eka-boron and eka-silicon were placed.

Answer 2

$scandium \: and \: germanium \\ hope \: my \: answer \: helps \: you \: mate \:$