Question

4 multiple choice 1 point which of the following is not a type of electromagnetic radiation? ultraviolet light mechanical waves x - rays fm radio waves 5 multiple choice 1 point find the number of protons and neutrons for the isotope dysprosium - 158 protons 66, neutrons 158 protons 158, neutrons 66 protons 66, neutrons 92 protons 92, neutrons 66 6 multiple choice 1 point find the number of protons and neutrons for the isotope sulfur - 34 protons 16, neutrons 18 protons 32, neutrons 34 protons 16, neutrons 34 protons 34, neutrons 16 7 multiple choice 1 point find the symbol for the element with 65 protons and 94 neutrons 65tb 94tb 155tb 159tb

Explanation:

Step1: Recall EM radiation types

Electromagnetic radiation includes UV, X - rays, FM radio waves. Mechanical waves are not EM radiation.

Step2: Recall isotope proton - neutron rules

For dysprosium - 158, atomic number of Dy is 66 (protons), neutrons = 158 - 66 = 92.
For sulfur - 34, atomic number of S is 16 (protons), neutrons = 34 - 16 = 18.
For element with 65 protons, it is Tb, mass number = 65 + 94 = 159.

Answer:

1. B. mechanical waves
2. C. Protons 66, Neutrons 92
3. A. Protons 16, Neutrons 18
4. D. $^{159}$Tb