Which representation conveys that the probability of finding an electron at the nucleus is zero?

A) Based on the photoelectron spectrum, identify the unknown element and write its electron configuration. B) Consider the element in the periodic table that is directly to the right of the element identified in part (a). Would the 1s peak of this element appear to the left of, right of, or in the same position as the 1s peak of the element in part (a)? Explain your reasoning.

18. (a) What did Ernest Rutherford observe during his experiments? (b) What did Niels Bohr observe during his experiments? (c) How did the work of each scientist contribute to the development of the planetary model of the atom? Explain your ideas in at least four (4) sentences.

Which of the following types of electromagnetic radiation has the lowest frequency? yellow blue orange green purple