Gold has one stable isotope, whichis gold-197, with an atomic mass of 196.97amu. A 14k (14-karat) gold contains 58.3% of gold and 41.7% of other metals. How manyatoms of goldare present in a 5.00-g sample of 14k gold?

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A: Isotopes are defined as the elements with same atomic number but different mass number. For Eg…

Q: In what ways are isotopes are alike? In what ways are they different?

A: Isotopes are the atoms of same element having the same atomic number.

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: Why is ⁴⁰₂₀Ca the most stable isotope of calcium?

A: The atoms of the same element which have the same atomic number but different mass number are called…

Q: 85 11. For the Isotope 38Sr A. What is the atomic number? B. What is the mass number? C. What is the…

A: The given symbol for isotope is 8538Sr A) The atomic number is represented by the subscript.     The…

Q: How many protons, neutrons and electons are in 31P3-

A: The element  31P3- It is Phosphorus and having atomic number 15 and atomic mass 31.

Q: Which isotope has the same number of electrons and neutrons as the anion 19F-?

A:

Q: The atomic masses of nitrogen-14, titanium-48, and xenon-129 are 13.999234 amu, 47.935878 amu, and…

A: Given, the atomic masses of nitrogen-14, titanium-48, and xenon-129 are 13.999234 amu, 47.935878…

Q: The element copper has two naturally occurring isotopes with masses of 62.9400 amu and 64.9300 amu.…

A: The element copper has two naturally occurring isotopes with masses of 62.9400 amu and 64.9300 amu.…

Q: 10. For the Isotope 6731Ga A. What is the atomic number? B. What is the mass number? C. What is the…

A: Question 10: Given isotope is: 6731Ga. What is its atomic number? What is its mass number? How many…

Q: If an isotope has 90 protons, how many neutrons are required in order for it to have a stable atomic…

A: Concept-: Isotope: Isotopes are known as members of a family of an element which all have the same…

Q: Which isotopes would you expect to be stable? 208 pb 234Pa uranium-235 oxygen-16 He

A: The isotopes which are expected to be stable are given below

Q: The last “missing” element from the first six periods waspromethium, which was finally discovered in…

A:

Q: How are the isotopes of an element different from one another?

A: Isotopes are atoms of the same element which are different in mass. That means They have the same…

Q: 2.28 The following radioactive isotopes are used in medicine for imaging organs, studying blood…

A: Isotopes are the nuclides which contain same atomic number but different mass number. Atomic number…

Q: uppose a new element is discovered and it has two stable isotopes. One isotope has a mass of 73.372…

A: When an element has more than one isotope, then we will take average atomic mass to calculate…

Q: Prior to 1961, the atomic mass standard was defined as 1/16 ofthe mass of ¹⁶O. Based on that…

A:

Q: Even though several elements have only one naturallyoccurring isotope and all atomic nuclei have…

A: The average mass of naturally formed isotopes is the atomic mass of the atom and the sum of number…

Q: A certain element consists of two stable isotopes. The first has an atomic mass of 106.9051 amu and…

A:

Q: Which of the following is an isotope of Manganese - 55? A) 55Mn B) 55Fe C) 95Mo+2 D) 54Mn

A: The species of an element which differs in the mass number is said to be isotope.  Atomic number of…

Q: A sample of the nonexistent element mythium consists of 25.59% of an isotope with mass number 580,…

A:

Q: how many isotopes of bromine exist ?

A: Isotopes:The variants of a chemical element, which have same number of protons and differs in number…

Q: Which demonstrates the existence of isotopes? a. 18 Ar and K b. ºC and EN c. 23 Th and 23 Th d. 7Z1…

A: Isotopes : Two or more forms of the same element that contain same atomic number (same number of…

Q: Using the periodic table, what is the element in period 5 with no stable isotopes? Please explain…

A: Technetium is a chemical element  with the symbol Tc and atomic number 43. It is the lightest…

Q: TRUE or FALSE: Isotopes are elements that have a different number of protons.

A: All atoms can be identified by the no. of protons and neutrons they contain. The no. of protons in…

Q: Radon is a radioactive gas that can cause lung cancer. It has been detected in the basement of some…

A: Atomic number of radon Rn = 86  Mass number of Rn-220 = 220

Q: 7. In an atom, the charge of the dense fraction is similar to that of alpha particles.

A: The answer is as follows:

Q: Consider two isotopes Fe-54 and Fe-56, write the nuclear symbol for both isotope. How do they differ…

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Q: Element X is a radioactive isotope such that every 28 years, its mass decreases by half. Given that…

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Q: Determine the missing element ----   3516S---->  -10e     +     ?

A: From given nuclear reaction  Missing element in the reaction is shown below

Q: Write the isotopic symbol for Lead-206.

A: • We need to write the isotopic symbol for Lead-206

Q: Why does Sodium (Na) have fewer stable isotopes than Magnesium (Mg)?

A: The stable isotopes of an element depend on n/p ratio, if n/p close to 1 then it is likely to be…

Q: Does an isotope have the same number of protons or neutrons?

A: Isotopes = Element with same Atomic No but different atomic mass are termed as Isotope  e.g. Two…

Q: Explain how the isotopes of an element are alike and how they are different.

A: An atom is composed of protons, electrons, and neutrons. The protons and neutrons are present in the…

Q: For each pair of elements listed, predict which one has more stable isotopes:(a) I or Sn(b) Ga or…

A: To solve this problem, we need to know the ratio:

Q: Atoms X, Y, Z, and R have the following nuclear compositions: 412 R 410 Y 183 412 Z 186 410 X 186…

A: Isotopes of any element have same atomic number but different atomic mass. i.e. isotopes of any…

Q: Select the single best answer. For this pair of elements (F and Se), predict which one has more…

A:

Q: The atomic mass of rhenium is 186.2. Given that 37.1% of natural rhenium is rhenium-185, what is the…

A: Average atomic mass = ∑i=1n (mass of ith isotope)(% abundance of ith isotope)100 Where "n"…

Q: An atom of a carbon-14 isotope would contain how many protons, neutrons, and electrons?

A: The correct answer is given below

Q: Isotope 25Mg2+ has: Number of protons Number of neutrons Number of electrons Mass number

A: Given :-  25Mg2+  To calculate :-  number of protons  number of neutrons  number of electrons  mass…

Q: Arrange the isotopes of sulfur and phosphorus in order of decreasing the number of neutrons.

A:

Q: A new element has been discovered. This element has an atomic mass of 120.946 amu and only two…

A: Solution :        Atoms are very important basic building blocks of an element which consists of…

Q: All changeve Radioactive isotopes of elements can be used in medicine to diagnose and treat disease.…

A: Answer: A radio active isotope has an unstable nucleolus that emits smaller particles.

Q: How can isotopes be used to identify the general region of a person’s place of residence?

A: Every organic and inorganic contains certain stable isotopes in different abundance. Isotope…

Q: Sulfur has four naturally occurring stable isotopes. The onewith the lowest mass number is…

A: Introduction: As we know, Atomic mass =∑isotope mass +% Isotope abundance100 We know there are four…

Q: 25Mg an isotope to 25Mg2+ ? Yes or No

A: Answer:  Isotope: isotope is is speics that have same in atomic number and different in mass…

Q: What is the mass of the other isotope of Boron given 11B has a mass of 11.0093 amu and an abundance…

A: Isotopes of boron are 11B and 10B. Average atomic mass=∑mass of isotope×Relative abundance %100 Mass…

Q: Below are the five atomic models in history. Number them in historical order from 1 to 5. (1 being…

A: The 5 atomic models in history are given. They are to be numbered in historical order from 1 to 5.…

Q: Naturally occurring uranium has three isotopes. Calculate the atomic mass of uranium with these…

A:

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.