Elements of which of the following groups on the periodic table always occur naturally as monatomic elements? A) Noble Gases B) Halogens C) Chalcogens D) Pnictogens E) Group 4A (14) Elements

Q: A fictional element has two isotopes and an atomic mass of 76.34 amu. If the first isotope (Isotope…

A: Average atomic mass = 76.34 amu  First isotope = 20.21 amu  Second isotope = 80.76 amu  We have to…

Q: Which of the following is described as a pure substance that consists only of atoms with the same…

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Q: Explain the important distinctions between eachpair of terms:(a) cathode rays and X-rays(b) protons…

A: Hi, since you have posted questions with multiple subparts. We will answer the first three subparts…

Q: You are an element capable of producing oxygen when fused with you own kind, which element are you

A: Oxygen is a diatomic gas.

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Given data, Mass of 101Ru = 100.9 amu Mass of 102Ru = 101.9 amu Percentage abundance of 101Ru =…

Q: An element has three naturally occurring isotopes with the following abundances and masses::…

A: Since the atomic mass of any element is given by the average mass of its isotopes Hence the atomic…

Q: Give two examples of each of the following: (a) alkalimetals, (b) alkaline earth metals, (c)…

A: The answer and the explanation is as given below:  I am instructed to answer only three subparts…

Q: Choose one radioisotope and expalain its hazards and uses. b.) Give the A/Z and symbol-mass format…

A: Dear Subscriber! You have posted multiple questions. As per our policy, we have solved only first…

Q: 1 Elements ________ exhibit similar physical and chemical properties. Group of answer choices in…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: Describe why "new" elements (man-made elements) are created, or why do we benefit in creating them?…

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Q: Search the web or your textbooks for an illustration of Mendeleev’s periodic table. How many…

A: Given : Mendeleev periodic table  To find : Describe it properly and compare it with modern periodic…

Q: which of the following statements is correct? a. All elements must contain protons, neutrons and…

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Q: Which of the following elements would be classified as a nonmetal? a.) silicon  b.) francium c.)…

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Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

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Q: For each of the elements Na, Ni, Al, P, Cl, and Ar, providethe following information:a. Which are…

A: In the periodic table, elements are arranged as a function of their atomic number. There is a…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Given that Isotope Mass (amu) Relative Abundance 100Ru 99.9 48% 99Ru 98.9 52%   To…

Q: what is the diameter of the “atom” with a nucleus this size?

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Q: 49.31%. What is the relative atomic mass of Br? 2.9. An isotope of lead has an isotopic mass of 208.…

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Q: Elements with chemical properties most similar to those of sodium are listed in what part of the…

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Q: Approximately how many elements are listed in the periodic table? How many can be found in nature?…

A: Periodic table of elements is arrangement of elements in tabulated form. In this, the elements are…

Q: 21. The elements in Group 7A are known by what name? A. transition metals B. halogens oli m D.…

A: Group 7A of the periodic table consists of the elements: fluorine (F), chlorine (Cl), bromine (Br),…

Q: An example of an element is chicken noodle soup powerade air inside a balloon lead pipe baking soda…

A: An element is a pure form of substance in which all atoms have same number of proton so here we see…

Q: If the cube with the same mass as part A is made of iron, determine the edge length of this cube (in…

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Q: Only two isotopes of copper occur naturally, 63Cu (atomic mass = 62.9296 amu; abundance 69.17%) and…

A: It is given that :Atomic mass of 63 Cu = 62.9296 amuNatural abundance of 63 Cu = 69.17 %Atomic mass…

Q: Which element would be expected to have chemical and physical properties closets to those nitrogen(N…

A: sulfur, because it's in the same groupGroups are columns of a periodic table. Both oxygen and sulfur…

Q: Which of the following statement is true for atomic mass of 39 19 K ? Group of answer choices   A.)…

A: Which of the following statement is true for atomic mass of 39 19 K ?

Q: 1H, 2H, and 3H are examples of ________ because they have different numbers of ________.…

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Q: An element has two naturally occurring isotopes. One has an abundance of 58.009% and an isotopic…

A: Isotopes of any element is the Pair of element with same atomic number but different mass number.

Q: Which group of three elements contains a transition metal, a halogen, and noble gas? a) S, I, Cu b)…

A: Since the Halogen elements are F, Cl, Br, I, At And noble gases are He, Ne, Ar, Kr, Xe, Rn

Q: 86. the symbol for the atomic number is Z the United States has the largest water footprint of…

A: Given:  Q 86 to 95 for True or False Q 96 to 100 for Matching

Q: Magnesium constitutes about 2% of Earth’s crust and has three naturally occurring isotopes. Suppose…

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Q: for elements (Br, Ca, Fe, Na, S, Si, and Xe) which of the following term(s) apply? a. metal b.…

A: To classify the elements we have see in which block of the periodic table  the given element is…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Answer :-  R44101u…

Q: A naturally occurring element identified by the symbol 'X', has the following isotopic composition…

A: The question is based on concept of atomic mass calculations. we have been given percentage…

Q: The natural abundances and isotopic masses of the element neon (Ne) areIsotope               %…

A: Average atomic mass is equal to the product of % abundance and isotopic mass. Average atomic mass is…

Q: An element has four naturally occurring isotopes with the masses and natural abundances given here.…

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Q: 9) If an element has its atomic mass as 24, it can be Magnesium?lf yes? No? What information is…

A: Metal :- which are good conductor of electricity.  Non-metal :- which do not conduct electricity.…

Q: Boron occurs naturally as 10B and 11B. Which isotope is most abundant? (Refer to the Periodic…

A: The isotopes can be described as the types of the species which have equivalent atomic number…

Q: Which of the following statements best describes the elements in Group 8A (18) of the periodic…

A: The elements in Group 8A (18) are : Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and…

Q: O ATOMS, IONS AND MOLECULES Finding atomic mass from isotope mass and natural abundance A robot…

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Q: The element gallium has two naturally occurring isotopes, gallium-69 (68.9256 amu) and gallium-71…

A: Given , two isotopes of gallium (Ga) are 69Ga = 68.9256 amu 71Ga = 70.9247 amu  Let, % abundance of…

Q: Elements in the same period (row) have the Same number of what?

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Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

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Q: (a) How many elements are found in period 4 in the periodic table? (b) How many elements are found…

A: a) The fourth period contains 18 elements beginning with potassium and ending with krypton.

Q: What is the relative atomic mass of a hypothetical element that consists of the following isotopes…

A: Relative atomic mass can be calculated by using the following formula, Relative atomic mass = ΣMixi…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Given that: Isotope Mass(amu) Relative abundance 98Ru 97.9 90.3% 99Ru 98.9 9.7%

Q: Fill-in the table with the necessary information. Element Atomic Number Mass Number No. Of Protons…

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Q: What is the relationship between an isotope’s abundance in nature and an element’s atomic mass…

A: Isotopes are atoms of same elements which have same atomic number but different mass number.

Q: There are only two naturally-occuring stable isotopes of lithium. The mass and natural abundance of…

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Group 14 Elements

The following elements come under group 14 of the periodic table.