Use the information to answer the following question. Color Element Red Orange Strontium Calcium Yellow Sodium Green Copper Purple Potassium Red Unknown What is the identity of the unknown element and why is the color emitted? O A. Strontium, because electrons move from ground state to excited state to emit light O B. Potassium, because as electrons fall back from an excited state to ground state they emit light O C. Potassium, because electrons move from a ground state to an excited state to emit light O D. Strontium, because as electrons fall back from an excited state to ground state they emit light Lenovo

Use the information to answer the following question. Color Element Red Orange Strontium Calcium Yellow Sodium Green Copper Purple Potassium Red Unknown What is the identity of the unknown element and why is the color emitted? O A. Strontium, because electrons move from ground state to excited state to emit light O B. Potassium, because as electrons fall back from an excited state to ground state they emit light O C. Potassium, because electrons move from a ground state to an excited state to emit light O D. Strontium, because as electrons fall back from an excited state to ground state they emit light Lenovo

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Which one of the statements about electrons and atoms is now considered INCORRECT? Select one: a. Electrons are best described as standing waves oscillating in the space around the nucleus. b. Electrons have well-defined mass and charge, but their exact position is uncertain. c. Electrons circle the nucleus in elliptical orbits determined by the atom’s nuclear charge. d. In each energy level above n=1, there are multiple regions of space an electron can occupy. e. Two electrons can be paired in the same orbital as long as they have opposite spins.
A light sample containing one mole of photons emits an energy of 1.65kj/mol. Find the frequency of one photon.
What happens to an electron in an atom when it absorbs energy? Check all that apply The electron re-emits the energy as light O The electron gets promoted to a higher energy level The extra energy increases the speed of the electron in its orbitals The electron stores energy for later use V The electron falls from the excited state back down to the ground state
7. Give the Bohr orbit configurations and draw the electron dot symbol for each of the following elements. a. Ne b. Mg C. P d. Se e. Rb
The Emission spectrum of an element is unique. Explain why the emission spectrum is sometimes referred to as an element’s fingerprint. Determine the nature of an unknown chemical. Relate it with Bohr’s Theory
Because the atoms of a given element emit only certain photons of light, only certain_____ occur in those particular atoms.
Which has the greater wavelength, blue light or red light? How do the frequencies of blue light and red light compare? How does the energy of blue light compare with that of red light? Does blue light have a greater speed than red light?
This energy diagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI prefix 'zepto' means 10-21. You can find the meaning of any SI prefix in the ALEKS Data tab.) energy (z)) 1400. 1200- 1000 800- 600- 400 200 0 C B A Use this diagram to complete the table below. What is the energy of the electron in the ground state? What is the energy of the electron in the first excited state? If the electron makes the transition shown by the red arrow, from A to C, will a photon be absorbed or emitted? Calculate the wavelength of the photon that would be absorbed or emitted. Round your answer to 3 significant digits. 100 ZJ 550 ZJ absorbed O emitted nm x10 X S