araP РearTn CourOpenVellumHMAC=D1017085f8c4840b06e3b3211aad414c5#10001GC1 sp22Hi, Joelvi vionic substancesI Review |Constants | PeriodicGive the number of protons and neutrons in 3 X.therotonsExpress your answers as an integers. Enter your answers numerically separated by a comma.Vo AEOP,n =SubmitRequest AnswerPart CIdentify the element 12X.Express your answer as a chemical symbol.hp

Give the number of protons and neutrons in X. 33- Express your answers as an integers. Enter your answers numerically separated by a comma. P.n = Submit Request Answer Part C Identify the element 2X. Express your answer as a chemical symbol.

Give the number of protons and neutrons in X. 33- Express your answers as an integers. Enter your answers numerically separated by a comma. P.n = Submit Request Answer Part C Identify the element 2X. Express your answer as a chemical symbol.

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

Chapter3: Stoichiometry

Section: Chapter Questions

Problem 39E: An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass...

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Similar questions

2.87 What is the heaviest element to have an atomic weight that is roughly twice its atomic number? What does this suggest must he true about the nuclei of atoms with higher atomic numbers?
Which of the following elements is a metalloid? (a) Ge (b) S (c) Be (d) Al
2-43 Which group(s) of the Periodic Table contain(s): (a) Only metals? (b) Only metalloids? (c) Only nonmetals?
2-17 How does Dalton’s atomic theory explain: (a) the law of conservation of mass? (b) the law of constant composition?
2-23 It has been said, “The number of protons determines the identity of the element.” Do you agree or disagree with this statement? Explain.
The mass-to-charge ratio for the positive ion F+ is 1.97 107 kg/C. Using the value of 1.602 1019 C for the charge on the ion, calculate the mass of the fluorine atom. (The mass of the electron is negligible compared with that of the ion, so the ion mass is essentially the atomic weight.)
Mass spectrometric analysis showed that there are four isotopes of an unknown element having the following masses and abundances: Three elements in the periodic table that have atomic weights near these values are lanthanum (La), atomic number 57, atomic weight 138.9055; cerium (Ce), atomic number 58, atomic weight 140.115; and praseodymium (Pr), atomic number 59, atomic weight 140.9076. Using the data above, calculate the atomic weight, and identify the element if possible.
How would you expect the chemical properties of isotopes of the same element to compare to each other? Explain your answer.
These questions concern the work of J. J. Thomson. a. From Thomsons work, which particles do you think he would feel are most important for the formation of compounds (chemical changes), and why? b. Of the remaining two subatomic particles, which do you place second in importance for forming compounds, and why? c. Propose three models that explain Thomson's findings and evaluate them. To be complete you should include Thomsons findings
The element gallium, used in gallium arsenide semiconductors, has an atomic weight of 69.72 amu. There are only two isotopes of gallium, Ga with a mass of 6.9257 amu and Ga with a mass of 70.9249 amu. What are the isotopic abundances of gallium? Gallium melts just above room temperature
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?
Here are three fictitious elements and a molecular view of the atoms that compose them. The molar mass of the middle element, (b), is 25 grams per dozen (g/doz). (The atoms of these fictitious elements are much larger than ordinary atoms.) Based on the size of the atoms, do you expect the atomic masses of elements (a) and (c) to be greater than or less than (b)? How many atoms are present in 175 g of element (b)?