What is the electron configuration of the element in group 13 and period 3 on the periodic table? * O [Ar] 452
O [Ne] 3s23p2
O [Ne] 3s23p'
O [Ar] 4s23d104p2

Explain why scientists use shared characteristics to make cladograms.

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.