ACROSS1. After you remove an electron from a neutral atom.5. Mendeleev developed the FIRST periodic table. He arranged his elements by thedo not put a space between the two words)6. Element found in Period 3 & Group 147. Element found in Period 4 & Group 29. Element found in Period 3 & Group 18(two words,DOWN2. Chemical family of gases that do not chemically react with any element (two words, do not put aspace between the two words)3. As you go down a chemical family, the reactivity will4. Elements are currently arranged on the periodic table by their(two words, do not put a spacebetween the Lwo words)8. After you add an electron to a neulral atom

Given: The statements related to periodicity of elements & properties of elements. The solution…

Answered: 21 6. ... ACROSS 1. After you remove an…

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 pair of elements do you expect to be the most similar? a. Molybdenum and Tin b. Nitrogen and Nickel c. Silicon and Phosporous d. Sodium and Magnesium e. Chorine and Fluorine
16. Average atomic mass is different from mass number because... A. the average atomic mass describes the mass number of a single atom, but mass number describes the average of all exact masses among isotopes of an element. B. mass number describes the approximate mass of the nucleus of a single atom, but average atomic mass describes the weighted average of all the exact masses among isotopes of an element. C. mass number describes the exact mass of a single atom, but average atomic mass describes the average of all mass numbers. O D. mass number describes the approximate mass of the nucleus of a single atom, but average atomic mass describes the largest mass among isotopes of an element.
Water contains small amounts of the element fluorine, which helps to strengthen tooth enamel and prevent cavities. What would you expect to happen to the fluorine element when it is added to drinking water? a. Fluorine would lose an electron and would be found as HF. b. Fluorine would gain a proton, becoming a radioactive isotope. c. Fluorine would gain an electron and would be found as F- or HF. d.Fluorine would form a covalent bond with water.
Periodic Table 15. Write the letter of each statement that is true about the average atomic mass of an element and the relative abundance of its isotopes. a. In nature, most elements occur as a mixture of two or more isotopes. b. Isotopes of an element do not have a specific natural percent abundance. c. The average atomic mass of an element is usually closest to that of the isotope with the natural highest abundance. d. Because hydrogen has three isotopes with atomic masses of about 1 amu, 2 amu and 3 amu, respectively, the average atomic mass of natural is 2 amu.
Which element is solid at room temperature and a good conductor of heat and electricity? A. hydrogen B. phosphorus C. boron D. sodium
A pictorial representation of JJ Thomson's model of the atom would be describec solar system; similar to planets orbiting the sun. small bb sphere. a chocolate cookie; where the electrons are the chips. set of concentric circles surrounding a solid object.
The element tin would be classified as: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a A non-metal b A d-transition metal An f-transition metal A post-transition metal e A metalloid
4. Chapter: 1 Lesson: 1 Question: The symbol for one of the stable isotopes of sulfur can be written: 34S. How many protons, neutrons and electrons are in this isotope? Hint: What does the superscript 34 tell you about the atom?
number of fluorine. A tremendous explosion follows emitting light and heat able to be observed from a 41) A teenage child in Wisconsin throws a chunk of sodium metal into a lake consisting of freshwater with an approximate density of 1.01 g/mL. The chunk of sodium has a mass (in kilograms) equal to the atomic number of fluorine. A tremendous explosion follows emitting light and heat able to be observed from a drone flying at an altitude of approximately 53 m. How many atoms of sodium from the original chunk remain in Wisconsin after the reaction is complete? This is an MCAT style question. Keep in mind that some of the data given may not be necessary to solve the problem. Use four sig figs. 1.019/mL ら3m a) 4.616E25 b) 2.357E23 c) 2.853E26 d) 8.390E22 53
Which of the following statements is TRUE, and why? A. Anions are usually larger than their corresponding atoms. B. A neutral atom contains the same number of protons and neutrons. C. Protons and electrons contribute equally to the mass of the atom.
Part B A certain element X has four isotopes. • 4.350% of X has a mass of 49.94605 amu. • 83.79% of X has a mass of 51.94051 amu. • 9.500% of X has a mass of 52.94065 amu. • 2.360% of X has a mass of 53.93888 amu. What is the average atomic mass of element X? Express your answer numerically to four significant figures. ► View Available Hint(s) 52.00 amu Submit Previous Answers Correct Part C What is the identity of element X from Part B? Express your answer as a chemical symbol.
The relative atomic masses of elements are seldom whole numbers because A. atoms of some elements have different atomic numbers. B. atoms of some elements have different masses. C. atoms of some elements have different numbers of electrons. D. atoms of some elements can form ions.

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