Elements are represented by chemical symbols. You have a friend who has difficultyList three tips that would help your friend correctly determine and write the symbols for151617the elements.CI33.0735.45chlorine30.97sulfurphosphorus1.2.

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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 53QAP

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Similar questions

Classify the following as compounds or elements: a silver bromide used in photography; b calcium carbonate limestone; c sodium hydroxide lye; d uranium; e tin; f titanium.
How many metals are in the following groups? (a) Group 1 (b) Group 13 (c) Group 17
How many nonmetals are in the following periods? (a) period 2 (b) period 4 (c) period 6
Draw a formula for each of the following molecules using circular symbols of your choice to represent atoms: a. A diatomic molecule of an element b. A diatomic molecule of a compound c. A triatomic molecule of an element d. A molecule of a compound containing one atom of one element and four atoms of another element
What is acompound? What are compounds composed of? What is true about the composition of a compound, no matter where we happen to find the compound?
a Which of the following substances would you expect to be elements and which would you expect to be compounds? 1 aluminum sulfate; 2 osmium; 3 radon; 4 lithium carbonate; 5 dimethylhydrazine. b On what general rule do you base your answers to part a? Can you name any exceptions to this general rule for compounds?
Most substances are composed of _________ rather than elemental substances.
In the following drawing, the green spheres represent atoms of a certain element. The purple spheres represent atoms of another element. If the spheres of different elements touch, they are part of a single unit of a compound. The following chemical change represented by these spheres may violate one of the ideas of Dalton’s atomic theory. Which one?
These questions concern the work of J. J. Thomson: From Thomson’s work, which particles do you think he would feel are most important in the formation of compounds (chemical changes) and why? Of the remaining two subatomic particles, which do you place second in importance for forming compounds and why? Come up with three models that explain Thomson’s findings and evaluate them. To be complete you should include Thomson’s findings.
In a neutron star, gravity causes the electrons to combine with protons to form neutrons. A typical neutron star has a mass half that of the sun, compressed into a sphere of radius 20 km. If such a neutron star contains 6.01056 neutrons, calculate its density in grams per cubic centimeter. Compare this with the density inside a 232Th nucleus, in which 142 neutrons and 90 protons occupy a sphere of radius 9.11013cm . Take the mass of a neutron to be 1.6751024g and that of a proton to be 1.6731024g .
Calculate the number of atoms in the universe. The following steps will guide you through this calculation: a. Planets constitute less than 1% of the total mass of the universe and can, therefore, be neglected. Stars make up most of the visible mass of the universe, so we need to determine how many atoms are in a star. Stars are primarily composed of hydrogen atoms and our Sun is an average-sized star. Calculate the number of hydrogen atoms in our Sun given that the radius of the Sun is 7108 m and its density is 1.4g/cm3. The volume of a sphere is given by V=(43)r3 (Hint: Use the volume and the density to get the mass of the Sun.) b. The average galaxy (like our own Milky Way galaxy) contains 11011 stars, and the universe contains 1109 galaxies. Calculate the number of atoms in an average galaxy and finally the number of atoms in the entire universe. c. You can hold 11023 atoms in your hand (five copper pennies constitute 1.41023 copper atoms.) How does this number compare with the number of atoms in the universe?
Name the following compounds: CsCl BaO K2S BeCl2 HBr AlF3 AlF3

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Elements are represented by chemical symbols. You have a friend who has difficulty List three tips that would help your friend correctly determine and write the symbols for 15 16 17 the elements. CI 30.97 33.07 35.45 phosphorus sulfur chlorine 1. 2. 3