Question

What is true of elements in a period on the periodic table?

Answer 1

They have similar properties.

They have similar names.

They have different properties that show no pattern.

They have different properties that repeat across the next period.

Answer 2

they are arrangeed as the atomic number increases
i gess but not sure

Answer 3

he said period not colum

Answer 4

It's A. Mendeleev arranged the periodic table by putting the elements in periods according to their properties and atomic masses. However, scientific discoveries have since then proven that elements should be arranged by atomic number.