5. A sample of Rb recovered from a nuclear reactor has an unusual distribution of isotopes. If the average atomic mass is 86.2700 amu. Given that the masses of the only two isotopes in the sample are Rubidium-85 = 84.9118 amu Rubidium-87 = 86.9092 amu What are the relative abundances of the two isotopes in percentages? Hint: Let%of85Rb=xandexpressthe%of87Rbintermsofx.

Q: In a far away universe, there exist an element called Macandcheesium (Mc). This element has 61…

A: The average atomic mass of an element is calculated as the average of all the isotopic masses of the…

Q: Botón is composed of two of two isotopes, one of mass 10.0129370 amu and one of mass 11.0093054 amu.…

A: Isotopes can be defined as members of family of an element that have the same atomic number but…

Q: Complete the following table: 46V Symbol Protons 15 Neutrons 15 68 52 Electrons Please enter the…

A:

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: (a) What isotope is used as the standard in establishing the atomic mass scale? (b) The atomic…

A: a)Atomic mass scale: It is relative scale used to determine the elements mass relative to…

Q: A sample of element Z has two naturally occurring isotopes.  The isotope Z-24 makes up 68.9% of the…

A: Interpretation: We have to calculate average atomic mass.

Q: A sample of an element has three isotopes: X with a mass of 18.321 amu and percent abundance of…

A: The average atomic mass of an element that has three isotopes is the fractional abundance of X times…

Q: . An element has three stable isotopes with masses of 27.977 amu, 28,976 amu, and 29.973 amu. The…

A:

Q: Silicon has three naturally occurring isotopes (Si-28, Si-29, and Si-30). Masses and natural…

A: From the values given in the table we will first calculate the abundance if Si-30 as shown in the…

Q: Calculate the weighted average of a substance from space. It has an abundance of 30.0% and 70.0% for…

A: The relative abundance definition in chemistry is the percentage of a particular isotope that occurs…

Q: In a naturally occurring sample, 19.8% of boron atoms have five neutrons and 80.2% have six…

A:

Q: Isotopes of the same element have different mass numbers? true or false

A: isotope are  two or more species of element  with the same atomic number and position in the…

Q: Uranium exists mainly as two isotopes in nature, possessing mass numbers 235 and 238. Write the full…

A: The atomic number of Uranium is 92. Hence number of protons in both isotopes = atomic number = 92

Q: A hypothetical element X has 2 major isotopes and an average atomic mass of 48.05 amu. Given that…

A: Average atomic mass=∑Atomic mass of an isotope×isotopic percentage100

Q: What isotope is used as the standard in establishing the atomic mass scale?  The atomic weight of…

A: The mass number given in the periodic table is the average mass of all the isotopes of an element.…

Q: an abundance of 2.365%. What is the abundance of the first isotoper a. 4.479% b. 6.957% d. 80.913%…

A:

Q: 1. Within the context of the atomic nucleus, what do the words stable and unstable mean?         2.…

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

Q: How are isotopes of a particular element alike? How are they different?

A: Isotopes are atoms of the same element that have different numbers of neutrons but the same number…

Q: 3. Which among the following represents a set of isotopes? Atomic nuclei containing: a) 20 protons…

A: Isotopes: Atoms having same atomic number (protons) but different atomic mass (n+p) are called…

Q: A particular element has 2 stable isotopes. If the first isotope has a mass of 14.754 amu and an…

A: Given that: Element has two stable isotope Mass of first isotope(m1) = 14.754amu Abundance of first…

Q: A hypothetical (fake) element has 2 naturally occurring isotopes. Isotope #1 has a mass of 185.8410…

A:

Q: What data must you know about the isotopes of an element to calculate the atomic mass of the…

A: The elements that have different atomic mass and same atomic number are known as isotopes.

Q: Natural gallium, which has an atomic weight of 69.7230 amu, consists of gallium-69 and gallium-71…

A:

Q: The atomic masses of the two stable isotopes of boron, boron-10 (19.78 percent) and boron-11 (80.22…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: 19,9924 AMU is the mass of one of the three isotopes of neon equaling 90.4838%. One of the other two…

A: Here, the three isotopes of Neon is

Q: In a far away universe, there exist an element called Macandcheesium (Mc). This element has 61…

A: An element existing away from universe, whose average atomic mass is to be determined.

Q: Please answer question a & b both.

A: Average atomic mass can be determined by the equation given below:

Q: Hi, I was wondering if you could help me with a question. Do I just take the percentage of each…

A: The isotopes of magnesium have following natural abundances: Isotope Abundance Mass (amu)…

Q: Devise a general method for determining the fractional abundances of two or more isotopes from a…

A: Since you have asked multiple questions questions, we will solve the first question for you. If you…

Q: 1.What are the properties og subatomic particles?

A: Given : Subatomic particles To find : Properties of subatomic particles  Solution : Everything is…

Q: Which of the following statement concerning the nucleus is NOT true? A) The density of a nucleus…

A: The nucleus is the positively charged center in an atom that contains protons and neutrons. The…

Q: Enter your answer in the provided box. 35 The atomic masses of the two stable isotopes of chlorine,…

A:

Q: A completely made up element called Krystogen has two naturally occurring isotopes. The atomic…

A: Every atom in periodic table has some atomic mass and atomic number. When atomic number of two…

Q: 1. (a) What isotope is used as the standard in establishing the atomic mass scale? (b) The atomic…

A:

Q: Thallium has two stable isotopes, 203TIand 205TI. Knowing that the atomic weight of thallium is…

A:

Q: Iculate the atomic weight of Magnesium given the mass and natural occurrence of each tope. Express…

A: We have given the masses and isotopic abundance of three isotopes of magnesium. Isotopes of an…

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46T.…

A:

Q: b. An atom that has a mass number of 39 and contains 19 protons. Potassium C. An atom with mass…

A:

Q: 1. Use paragraph 1 and 2 to describe how the element with 115 protons was created. 2) The newly…

A: Elements are the pure substances that contain atoms of same type. It is identified by number of…

Q: B) The average atomic mass of chlorine is 35.453. Does this mean that there are just two stable…

A: In order to explain the answer for the above question we have to first understand the given question…

Q: An imaginary element Xq consists of two isotopes having masses of 100.0 amu and 102.0 amu. A sample…

A: When an element exists in the form of two or more than two isotopes, the term average atomic mass Is…

Q: One of the heaviest atoms found in nature is 238U. Its relativeatomic mass is 238.0508 on a scale in…

A: Given, 238U relative atomic mass is 238.0508

Q: There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.63%. Now…

A:

Q: Atmospheric argon is a mixture of three stable isotopes 36Ar, 38Ar, and 40Ar.  Use the information…

A:

Q: An unknown element X has the following isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant). What…

A: Average atomic mass of X can be calculated as  Average atomic mass of X = ( Atomic mass of ²⁵X * %…

Q: Three stable isotopes of Wolfgangium Wf - 256 has a mass of 255.758 amu and abundance of 0.25000,…

A: Given: Mass of Wf-256 = 255.758 amu. Abundance of Wf-256 = 0.25000. Mass of Wf-258 = 257.742 amu.…

Q: 4. Which of argon's three isotopes is most abundant: argon-36, argon-38, or argon-40? (Hint: the…

A: The average atomic mass of an element can be easily seen on the periodic table, typically under…

Q: Calculated the weighted average of a substance from space. It has an abundance of 30.0% and 70.0%…

A: The average weight of a substance can be calculated by adding the product of mass of each of its…

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.