Chemistry In Focus
7th Edition
ISBN: 9781337399692
Author: Tro, Nivaldo J.
Publisher: Cengage Learning,
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Chapter 3, Problem 4E
Interpretation Introduction
Interpretation:
The three different ways by which chemical elements were named are to be listed.
Concept Introduction:
A chemical element is a material that cannot be fragmented or altered into another substance. Each element is specified according to the
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What is the name of the alkali metal that is in period 3?
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An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.260% abundance with 20.99 amu, and 8.82% abundance with 21.99 amu. Calculate the weighted average atomic mass of this element. Use the correct number of significant figures in your answer. Identify the element, by name and symbol.
17 of 9
Some groups have names. Enter the number-letter version of the group number for each of these named groups. Be sure to include the
number and letter.
Alkali metals:
Alkaline earth metals:
Halogens:
Noble gases:
X
Chapter 3 Solutions
Chemistry In Focus
Ch. 3 - Determining the Number of Protons and Electrons in...Ch. 3 - Prob. 3.2YTCh. 3 - Determining Protons, Neutrons, and Electrons How...Ch. 3 - Calculating Atomic Mass Magnesium has three...Ch. 3 - The Mole Concept A diamond, which is pure carbon,...Ch. 3 - The Mole Concept II Calculate the number of atoms...Ch. 3 - Your friend tells you about an article that he...Ch. 3 - Prob. 2SCCh. 3 - Prob. 3SCCh. 3 - Copper is composed of two naturally occurring...
Ch. 3 - Prob. 5SCCh. 3 - Which pair of elements do you expect to be most...Ch. 3 - Which statement is true of the quantum mechanical...Ch. 3 - Why is it important to understand atoms?Ch. 3 - Prob. 2ECh. 3 - What defines an element? How many naturally...Ch. 3 - Prob. 4ECh. 3 - Prob. 5ECh. 3 - Prob. 6ECh. 3 - Prob. 7ECh. 3 - Prob. 8ECh. 3 - Prob. 9ECh. 3 - Prob. 10ECh. 3 - Explain the quantum mechanical model for the atom....Ch. 3 - Give two examples of each: a. alkali metal b....Ch. 3 - Which elements exist as diatomic molecules?Ch. 3 - Explain the difference and similarity between...Ch. 3 - Prob. 15ECh. 3 - Determine the charge of each of the following: a...Ch. 3 - Determine the number of protons and electrons in...Ch. 3 - Determine the number of protons and electrons in...Ch. 3 - Give the atomic number (Z) and the mass number (A)...Ch. 3 - Prob. 20ECh. 3 - The following isotopes have applications in...Ch. 3 - The following isotopes are important in nuclear...Ch. 3 - 14C is used in carbon dating of artifacts....Ch. 3 - 40K is used to measure the age of Earth. Determine...Ch. 3 - Prob. 25ECh. 3 - Prob. 26ECh. 3 - Give electron configurations according to the Bohr...Ch. 3 - Give electron configurations according to the Bohr...Ch. 3 - Prob. 29ECh. 3 - How many valence electrons are in each element of...Ch. 3 - Prob. 31ECh. 3 - Draw electron configurations for each of the...Ch. 3 - Which two of the following elements would you...Ch. 3 - Group the following elements into three similar...Ch. 3 - We have seen that the reactivity of an element is...Ch. 3 - What is the electron configuration of Mg2+? How...Ch. 3 - Classify each of the following elements as a...Ch. 3 - Classify each of the following as a metal, a...Ch. 3 - Calculate the atomic mass of neon (Ne), which is...Ch. 3 - An element has two naturally occurring isotopes....Ch. 3 - A fictitious element has two naturally occurring...Ch. 3 - Copper has two naturally occurring isotopes. Cu-63...Ch. 3 - How many moles of titanium are present in 124 g of...Ch. 3 - Prob. 44ECh. 3 - How many moles are there in each sample? a. 45 mg...Ch. 3 - How many moles are there in each sample? a. 55.0 g...Ch. 3 - What is the mass of each sample? a.1.8 mol S...Ch. 3 - What is the mass of each sample? a.2.75 mol Fe...Ch. 3 - Determine the number of atoms in each sample....Ch. 3 - Determine the number of atoms in each sample....Ch. 3 - How many Ag atoms are present in a piece of pure...Ch. 3 - How many platinum atoms are in a pure platinum...Ch. 3 - A pure gold necklace has a volume of 1.8cm3. How...Ch. 3 - A titanium bicycle component has a volume of...Ch. 3 - An iron sphere has a radius of 3.4 cm. How many...Ch. 3 - Calculate the number of atoms in the universe. The...Ch. 3 - The introduction to this chapter states that...Ch. 3 - Suppose the absolute value of the charge of the...Ch. 3 - When we refer to doughnuts or cookies, we often...Ch. 3 - Prob. 60ECh. 3 - Why does Avogadros number have such an odd value?...Ch. 3 - Prob. 62ECh. 3 - Prob. 63ECh. 3 - Prob. 64ECh. 3 - Here are three fictitious elements and a molecular...Ch. 3 - Prob. 66ECh. 3 - Gather any two of the following items, measure...
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- a What is the name of the alkali metal that is in Period 6? b What is the name of the halogen that is in Period 6? c What is the name of the alkaline earth metal that is in Period 3? d What is the name of the noble gas that is in Period 3?arrow_forwardWhich of the following is true about an individual atom? Explain. a. An individual atom should be considered to be a solid. b.An individual atom should be considered to be a liquid. c. An individual atom should be considered to be a gas. d. The state of the atom depends on which element it is. e. An individual atom cannot be considered to be a solid, liquid, or gas. Justify your choice, and for choices you did not pick, explain what is wrong with them.arrow_forwardAn isotope of an element contains 63 protons and 91 neutrons. (a) Identify the element and give its symbol. (b) Give the elements atomic number. (c) Give the mass number of the isotope. (d) This element has two naturally occurring isotopes. Given the information in the table, calculate the atomic weight of the element. (e) In which region of the periodic table is the element found? Explain your answer. (f) Is the element a metal, metalloid, or nonmetal? Explain your answer. (g) This element, used in compact fluorescent light bulbs and computer screens, has an atomic radius of 180 pm. Calculate how long the chain of atoms would be if all the atoms in a 1.25-mg sample of this element were put into a row.arrow_forward
- Give the names of the nonmetals that correspond to the following symbols: As, I, Xe, He, C, Si.arrow_forwardTwo compounds of iron and chlorine, A and B, contain 1.270 g and 1.904 g of chlorine, respectively, for each gram of iron. Show that these amounts are in the ratio 2 : 3. Is this consistent with the law of multiple proportions? Explain.arrow_forwardThe following isotopes have applications in medicine. Write their symbols in the form XZA. a. cobalt-60 b. phosphorus-32 c. iodine-131 d. sulfur-35arrow_forward
- Give three examples of gaseous elements that exist as diatomic molecules. Give three examples of gaseous elements that exist as monatomic species.arrow_forwardCobalt has three radioactive isotopes used in medical studies. Atoms of these isotopes have 30, 31, and 33 neutrons, respectively. Give the complete symbol for each of these isotopes.arrow_forwardthe first three please 23arrow_forward
- Give the chemical name for the ionic element/compound. Your answer will be marked incorrect if you did not spelled the element's name correctly. Mg2+ p3. NO3 Fe2+ HCO3 Ag* Be2+ C2H3O2 or CH3COOarrow_forwardComplete the following table. (Remember to use correct capitalization for the chemical symbol!) Number of Protons Number of Neutrons Symbol 79 118 53 74 37 50 24 32 39 50arrow_forwardWhich of the following elements require Roman numerals when writing their ion names? Select all that apply. Potassium Ruthenium Lead Chlorine Osmium Nickel Silver Bariumarrow_forward
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