1. Give the name and element symbol of the element described by the following a. A noble gas in period 4 b. Group 3A, period 3 Section (Show instructor at beginning of lab, hand in with entire packet) PRE-LAB QUESTIONS c. An alkaline earth metal, period 2 2. What is the maximum number of electrons located in each of the following energy levels? n=2 nx3 n=1 3. Describe two ways of how an isotope is different from another atom of the same element. 4. Watch video on D2L. Briefly describe the proper way to light a Bunsen burner.

1. Give the name and element symbol of the element described by the following a. A noble gas in period 4 b. Group 3A, period 3 Section (Show instructor at beginning of lab, hand in with entire packet) PRE-LAB QUESTIONS c. An alkaline earth metal, period 2 2. What is the maximum number of electrons located in each of the following energy levels? n=2 nx3 n=1 3. Describe two ways of how an isotope is different from another atom of the same element. 4. Watch video on D2L. Briefly describe the proper way to light a Bunsen burner.

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter4: Chemical Foundations: Elements, Atoms, And Ions

Section: Chapter Questions

Problem 109AP

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Similar questions

The existence of isotopes violates one of the original ideas of Dalton’s atomic theory. Which one?
One of the best indications of a useful theory is that it raises more questions for further experimentation than it originally answered. How does this apply to Dalton’s atomic theory? Give examples.
Your friend tells you about an article that he read in a tabloid that reported the discovery of a new form of carbon containing eight protons in the nucleus of its atoms. He claims that scientists are eager to explore the properties of this new form of carbon. What is wrong with the tabloid's claim? a. Nothing. The claim is believable. b. The claim must be false because an atom with eight protons would be oxygen, which is already known. c. The claim must be false because all forms of carbon are already known.
How would you expect the chemical properties of isotopes of the same element to compare to each other? Explain your answer.
Do the proton and the neutron have exactly the same mass? How do the masses of the proton and the neutron compare to the mass of the electron? Which particles make the greatest contribution W the mass of an atom? Which particles make the greatest contribution to the chemical properties of an atom?
Write isotope symbols for neutral atoms with the following characteristics: a. Contains 20 electrons and 20 neutrons b. Contains 1 electron and 2 neutrons c. A magnesium atom that contains 14 neutrons
State the main points of Dalton’s atomic theory usingyour own words. Which parts of Dalton’s theory werelater found to be erronous? Explain why.
Which of the following is(are) correct? a.40Ca2+ contains 20 protons and 18 electrons. b. Rutherford created the cathode-ray tube and was the founder of the charge-to-mass ratio of an electron. c. An electron is heavier than a proton. d. The nucleus contains protons, neutrons, and electrons.
For each of the isotopes in Exercise 21.1, determine the numbers of protons, neutrons, and electrons in a neutral atom of the isotope.
What defines an element? How many naturally occurring elements exist?
Consider Ernest Rutherfords -particle bombardment experiment illustrated in Fig. 2.12. How did the results of this experiment lead Rutherford away from the plum pudding model of the atom to propose the nuclear model of the atom?
The element lithium (Li) has an atomic mass of 6.94 amu and has two naturally occurring istopic forms. Based on this information, indicate whether each of the following statements is true or false? a. All Li atoms have a mass of 6.94 amu. b. Some Li atoms have a mass of 6.94 amu. c. Some Li atoms have a mass of less than 6.94 amu. d. Some Li atoms have a mass of greater than 6.94 amu.