Question

4 multiple choice 20 points which is not true about all of these elements? 5 b boron 10.81 13 al aluminium 26.982 31 ga gallium 69.723 49 in indium 114.82 they are all in the same group. they all share similar properties. they all have the same number of protons. they all have the same number of electrons on their outer shell.

Explanation:

• Elements in the same group (column) of the periodic table share similar properties and have the same number of electrons in their outer shell. Boron (B), Aluminium (Al), Gallium (Ga), and Indium (In) are in group 13.
• The number of protons is unique to each element (atomic number: B - 5, Al - 13, Ga - 31, In - 49).

Answer:

They all have the same number of protons.