Use the following table of data to calculate the average atomic mass of an unknown element, X: #protons # neutrons % atomic mass (amu) abundance 92.2297% 27.9769 4.6832% 28.9765 3.0872% 29.9738 14 14 14 14 15 16 mass number 28 29 30 Your prediction: A. The calculated value will be closest to 28. B. The calculated value will be closest to 29. C. The calculated value will be closest to 30.

Q: Silicon has three common isotopes, with the masses and isotopic abundances shown below: Silicon-28…

A:

Q: Question 24 ANSWER ON A SEPARATE PEICE OF PAPER. During a chemical reaction in the lab, element X is…

A: Element X has four isotopes and given that  Relative abundance      X280  = 95.0% X281 = 0.85% X282…

Q: Mass Mass Abundance Abundance Avg. mass (from Table 1) Symbol (from Table 1) (Avg. Mass) x (% Abun…

A: Isotopes are same elements that have same atomic number, that is same number of protons, but differ…

Q: IRevie Part B A certain element X has four isotopes. • 4.350% of X has a mass of 49.94605 amu.…

A: Atomic mass of an element can be defined as the mass of a one atom of given chemical element. It is…

Q: Silver has two stable isotopes. It is 51.80% Ag-107 and 48.20% Ag-109. The mass of the Ag-107…

A: In chemistry, the concept of isotopes is fundamental. Isotopes are variants of a chemical element…

Q: Suppose an element consisted of two isotopes with masses of 89.9 amu and 91.1 amu. If 1.500x103…

A: When elements occur in earth crust in more than 1 natural form or commonly known as isotopes, their…

Q: The isotopes of the same element have.... Equal numbers of neutrons The same mass numbers The same…

A: isotopes of the same element has same atomic number but different mass number. Mass number = Number…

Q: Some isotopes of iodine are radioactive, but others are not. When we speak of two isotopes of an…

A: Isotopes are different forms of a chemical element which have the same atomic number (number of…

Q: Fill in the table with the most information you can. Use pictorial illustrations whenever necessary.…

A: Structure of atom has been described on the basis of various types of atomic model given by various…

Q: In an electrochemical cell, a metal anode lost 0.152 g while a total volume of 0.04603 L of hydrogen…

A: The mass lost by metal anode is 0.152 g. The volume of hydrogen gas produced is 0.04603 L. The…

Q: Calculate the atomic mass element "X" if it has 2 naturally occuring isotopes withthe following…

A: Percent abundance of X-51 = 67.88 %  Percent abundance of X-53 = 32.12 %

Q: If a sample of the isotope is 1744 yeas old, what percent of the isotope would you expect to find in…

A: The given data : The life of the sample of isotope = 1744 years. The half-life of carbon = 5730…

Q: The atomic number, which defines the element is always equal to the total number of

A: Every element is made up of atoms . Atoms consists of electrons , protons and neutrons. These are…

Q: Argon (Ar) has three naturally occurring isotopes namely: Ar-36, Ar-38, and Ar-40. a) How are these…

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Q: Explain why atomic masses are not whole numbers.

A: The atomic masses are an important quantity of each element. Each element of the periodic table will…

Q: How many hydrogen atoms are there on the carbon atom labeled "B"?

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Q: Hypothetical element X has 3 stable isotopes. The relative peak intensities are 58.74 for 180.0 u.…

A:

Q: Say that on planet P3R-233, sulfur exists naturally as three isotopes. Calculate what the P3R-233…

A: The atomic mass of sulfur in the periodic table is weighted average of atomic masses of the isotopes…

Q: is there a way to find out what all the isotopes for an element is by looking at the periodic table?

A: Nuclear chemistry and atomic structure, which are fundamental aspects of chemistry that explore the…

Q: What is the mass of a single He atom? (Please type answer no write by hend).

A: Helium(He) is a noble gas. We have to find the mass of a single He atom.

Q: How many electrons are in an electrically-neutral atom of aluminum (Al) with a mass number of 27?

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Q: Determine the number of protons, electrons and neutrons for a neutral atom of silicone given a mass…

A:

Q: An unknown element X has the following isotopes: 126X (22.00% abundant), 12&X (34.00% abundant),…

A: Average atomic mass is given by the formula  Avg atomic mass = A1X1+A2X2+A3X3X1+X2+X3 A1 , A2 and A3…

Q: Estimate the average mass of element Y, if it is composed of two isotopes. The first isotope have a…

A: Average atomic mass = f1M1 + f2M2 +… + fnMn Where f = fraction representing the natural abundance of…

Q: Calculate the atomic mass of naturally occurring chlorine if 77.62% of chlorine atoms are…

A: To calculate atomic mass of chlorine:

Q: A- Determine the mass of nucleons and electron by atomic mass unit?

A: mass of 1  electron = 5.45e-4 amu, mass of proton = 1 amu and mass of neutron = 1.     Now, nucleons…

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

A: This element is Silicon as the data provided within the question is relevent to the Silicon Element

Q: 4. HYDROGEN Atomic Number: Atomic Mass: # of Protons: # of Electrons: # of Neutrons:

A: Given element,    Hydrogen (H)

Q: When an atom has one or more extra ____ it will have a ___ charge

A: An atom has an equal number of electrons and protons. i.e Number of protons= Number of electrons.…

Q: 5. Question: Magnesium has three naturally occuring isotopes. The masses and % abundances of the…

A:

Q: 13. .... ...The mass of the Avogadro constant of atoms, g/mol. normally, this is the average number…

A: We are to discuss that what the entity is known as, defined by the mass of avagadro constants of…

Q: If element X has an atomic mass of 37.45 amu and is composed of x-38 and x-35, find the percent x-38…

A: Concept introduction: Mass of an element is the actual amount of substance is present in it and mass…

Q: In complete sentences, describe the similarities and differences between:a. different isotopes of an…

A: (a) similarities and differences between isotopes of an element: Various isotopes of an element have…

Q: Which part of the atom has most of mass ?

A: Most of an atom's mass is in its nucleus.

Q: A fictitious element X has an average atomic mass of 122.397 u. Element X has two naturally occuring…

A: According to the question, The average atomic mass of the element X = 122.397 uThe mass of an…

Q: 1- select the relationship between the two atoms: Argon-40 Argon-41 a) Isotopes b) Different…

A: Basics :-  Atomic number (Z) :-  The number of protons present inside the nucleus of an atom is…

Q: 3. In discussing individual atoms öf å spe isotopes have in common, which subatomic particle…

A: 3. Isotopes have same atomic numbers but different mass numbers.  Atomic number  is determined by…

Q: How many protons, neutrons and electrons are present in the following: 40 a) s"B b) 173°CH c) 18°Ar…

A: The atomic number of element is the number of protons or electrons present in isolated neutral atom.…

Q: assume this element (45.0 amu) has three naturally occuring isotopes. first isotope has 15.0%…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.