A student saw the following nuclear symbol for an unknown element: 84 38 X Which of the following statements about X and X-84 are true? (Select all that apply.) X has 84 neutrons in its nucleus. X-84 has a neutron/proton ratio of about 1.2. Ox²+ has 40 electrons. X is strontium. O X is polonium.

Q: An unknown element is a mixture of isotopes ¹²⁰X and ¹²²X. The average atomic mass of X is 120.37…

A: 4. Given that,  An element X has two isotopes such as 120X and 122X. Atomic mass of 120X, MX120 =…

Q: 1.Which of these is a description of nuclear fission?

A: A is correct option.

Q: Strontium has 4 isotopes: Sr84 with 0.56% abundance and AMU of 3.9134, Sr86 9.86% abundance with AMU…

A: Let x 1 and x2 be the abundance of Sr87 and Sr88 respectively. Then we have Strontium Isotopes…

Q: Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81,…

A: The isotope given is 8135Br.

Q: 5. Use the periodic table to fill in the blank squares on the following table: Sodiu Manganes Mercur…

A: Electron, proton , neutron are sub atomic particles of atom. Number of protons gives atomic number…

Q: For Neon the relative percent abundances and atomic masses of the isotopes are: Ne-20, 90.92%,…

A:

Q: 4 An element has an atomic number of 45 and a mass number of 105. Using your determination as to…

A: The element with the atomic number 45 is Rhodium(Rh). Given the mass number of Rhodium(Rh), A = 105.…

Q: Earth Control, Tr, element #43 has 2 isotopes, 90Tr and 93Tr.   If the abundance of 90Tr is 65.52 %,…

A:

Q: The atomic weight of copper, Cu, is listed as 63.546. Which of the following statements are untrue:…

A: The atomic weight of copper Cu , is listed as 63.546 ★ Untrue Statements are........   × Not all…

Q: PICK the radloactive isotope in each set. 237 20 (a) Np 10 Ne 93 237 Np 93 20 Ne 10 Explain your…

A: The radioactive element is defined as an element which has an unstable nucleus due to the difference…

Q: In a re-creation of the Millikan oil drop experiment, the charges of numerous oil drops were…

A:

Q: ☆回 G Add-ons Help Last edit was 4 minutes ago в I U A 三|ニ Calibri 11 Q4) consider the element Xy…

A:

Q: 1. Answer the following: a. If a car has an EPA mileage rating of 30.0 miles per gallon, what is…

A: Answers are explained below.

Q: ow many protons (P), neutrons (n) and electrons (e) are present in 18173Ta-3 ? a. 76 p 105 n 73 e b.…

A:

Q: Express your answer in atomic mass units to four significant figures. atomic mass of Rb amu Submit…

A: Atomic mass=atomic mass of 1 atom×%abundance÷100 Calculating average atomic mass multiply percentage…

Q: 3. Boron (B; Z=5) has two naturally occurring isotopes. Find the percent abundances of ¹0B and ¹1B…

A:

Q: Determine the number of protons and electrons in each of the following ions. Cu^2+

A: Determine the number of protons and electrons in each of the following ions. Cu2+

Q: MCQ 33: Neutrons (nº) are neutral and carry A. positive charge B. negative charge C. no charge D.…

A: The particles in an atom which has neutral charge are known as neutron. This particles are…

Q: Answer True of False: 1. A proton and an electron have the same mass but opposite charges. 2. The…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: Practice: Isotope Calculations #1 Part Ue dhe motation below to anwer the following questions "C "C…

A: 9. The other form of isotope notation is nuclear notation which is significant because it allows us…

Q: Q1 Q2 Q3 Element: N Mass number: 15 23 Neutrons: 12 46 Protons: Electrons: 35

A: The different variants of a particular element, that are differed by the number of neutrons. In…

Q: 12. The mass and % abundance for the four isotopes of chromium is given in the table below. Isotope…

A: Given,

Q: Instruction: Fill up the table with the correct values for the atomic numbers, mass number, numbers…

A: Number of protons = atomic number  Number of neutrons = mass no.-atomic no. For a neutral atom :-…

Q: ▼ 19 Express your answers as Integers separated by commas. Np, Nn, Ne= Submit Part D 15| ΑΣΦ…

A:

Q: 3 attempts left Check my work Be sure to answer all parts. Give the following information for the…

A:

Q: How many electrons, protons, and neutrons are there in an atom ofa40Ca?   15 protons, 25 neutrons,…

A: In an atom of 4020Ca

Q: Bromine has two naturally occurring isotopes. Bromine-79 has a mass of 78.9183 amu and an abundance…

A:

Q: Boron (B; Z = 5) has two naturally occurring isotopes. Find the percent abundances of 10B and 11B…

A: The term isotopes refer to the atoms of a particular element which have same atomic number or same…

Q: Which of the following is the least massive?  a. A neutron b. A proton c. An alpha particle d.…

A:

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: weight germani owing lable pre ... Isotope Abundance Mass 70 Ge 20.8% 69.9242 amu 72 Ge 27.5%…

A: Given :

Q: Question 1 What is the proper definition of an isotope? Group of answer choices A. Atoms that…

A: Nuclear chemistry deals with the reactions involving in the nucleus of an atom. The nucleus of an…

Q: Tin is a metal that has several stable isotopes. Which of the following combinations of mass number…

A: The elements having same atomic number, but different mass number are termed as isotopes.

Q: Electron only has a-1 charge Proton only has a mass about the same as that of a proton Neutron only…

A: We can solve this question by difination of all subatomic partical electron proton and neotron.

Q: Lithium has 2 stable isotopes Li-6 and Li-7. One of them has an abundace of 92.5% and the other has…

A: Since the atomic mass of any element is average atomic mass of its isotopes. hence the atomic mass…

Q: QUESTION 29 Gallium (AAM = 69.723 amu) has two naturally occurring isotopes. Gallium-69 has an…

A: Answer

Q: Report Sheet-Lab 4 Questions and Problems Q.3 A neutral atom has a mass number of 80 and has 45…

A: In chemistry, the general representation of an element or atom is given below: MzA Here, M is the…

Q: 1. Write the nuclear symbol for Cu-64, which is used medically to scan brain tumors.  2. How many…

A: Given, Cu-64

Q: Name of them are Element Magnesium Atomic Symbol 80 34Se 228 88 Ra Number of Protons 28 Number of…

A: In an element : The number of protons in a nucleus is equal to the atomic number. The number of…

Q: 4.82 For each of the following, write the symbol and name for X and the number of protons and…

A:

Q: What is the symbol of the atom obtained by adding one proton to 2°N.? Express your answer as an…

A: Determine the symbol of the given conditions in the question-

Q: Which of the following is the least massive?  Group of answer choices An electron A proton An alpha…

A:

Q: <Unit 2 Homework Problem 4.35 3 of 14 I Review | Constants | Periodic Table Write the atomic symbols…

A: Atomic symbol is written with the help of atomic number and mass number.

Q: Be sure to answer all parts. Copper has two naturally occurring isotopes, 6Cu (isotopic mass 62.9296…

A: The percentage for a particular isotope that formed in nature is known as percent abundance.

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

A:

Q: For Practice: Given that there are only two stable isotopes of chlorine: chlorine-35, with a mass of…

A: Given : There are only 2 naturally occurring isotopes of chlorine. Mass of isotope-1 i.e 35Cl =…

Q: #23, 26,30,32,33,35,41,44,46,54,57,61,63 i need help

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Q: Part A Magnesium has three naturally occurring isotopes with masses of 23.99 amu, 24.99 amu, and…

A: Part AAtomic mass of magnesium can be calculated using the following formula.