The complete symbol of an atom with atomic number 20, mass number 42 is? Select one: до Са20 а. 42 Ca20 Ob. до К20 O c. до Са20 O d.

Q: Calculate the average atomic mass of uranium given its naturally occurring isotopes and their…

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Q: Please may you help me with following homework questions.  Q1. Describe the nuclear model of an…

A: Atom is a small unit which repeat itself and form the whole element. A pure element has all same…

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A: Rutherford had the gold foil experiment where he bombarded alpha particles on a thin sheet of gold…

Q: Which of the following contains two species which have the same mass number?   14C, 14N   12C, 13C…

A: The same mass number means the same nucleons.

Q: Sodium only has one naturally occuring isotope, 23Na, with a relative atomic mass of 22.9898 u. A…

A: Given, 22Na has a relative atomic mass of 21.9944 u. 23Na, with a relative atomic mass of 22.9898 u.…

Q: cteristic(s) of nuclei for which we predict a high deg even numbers of protons or neutrons. more…

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Q: 2. Use the following isotopes to answer the following 17 F, 135 Cs, 55 214 Po 84 write the nuclear…

A: Nuclear decay reaction: Also called as, Radioactive decay. It is reaction in which Radioactive…

Q: choose the correct answer.   36. Which of these represents an ion? *

A: Atomic number of an element is equal to number of protons present in nucleus of atom of that…

Q: an isotope with 25 electrons and 28 neutrons Express your answer as an isotope. ΑΣφ DA chemical…

A: Part C An isotope with 25 electrons and 28 neutrons:

Q: The radioisotope carbon-11 will decay through Periodic Table of the Elements hydrogen 1 H 13 14 15…

A: The radioisotope C-11 has 6 protons and 5 neutrons in its nucleus. The n/p ratio = 5/6 ~ 0.833

Q: stable isotopes, with low atomic numbers, have a N/Z ratio of 1. What does that imply

A: N/Z ratio - It is the ratio of the number of neutrons to the number of protons of the nucleus of an…

Q: 2. In a certain fission reaction, U-235 (atomic no 92) reacts with a neutron to form Cesium- 138…

A: Balanced nuclear equation is the equation in which the sum of subscripts as well as sum of…

Q: A sample containing 1.00X 10 stored for 135 day s will remain at the end of the storag e period of…

A: Reaction in which rate is linearly depend upon one reactant is known as first order reaction.

Q: Gallium occurs naturally as 69Ga and 71Ga. Given the mass and abundance of gallium-69 (68.92 amu…

A: Given, Gallium occurs naturally as 69Ga and 71Ga and mass and abundance of gallium-69 is 68.92 amu…

Q: Only two isotopes of Sb (antimony, Z=51) are stable. Pick the most likely stable isotope from the…

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Q: What does the number 84 represent in the name krypton -84?

A: Since we know that  a element having same atomic number but different mass number are known as…

Q: Indiana Jones replaces the idol with a bag of sand of approximately equal volume: (Denisty of gold =…

A: The density of a substance is given by:

Q: m. 29Cu + on → 63, 64

A: Nuclear chemistry: Neutron --------> proton + -1βo  When Addition of neutron (0n1) to nuclide( z…

Q: For the Isotope 8538SrA. What is the atomic number?B. What is the mass number?C. What is the number…

A: a) for 8538Sr  Atomic number = 38  as atomic number is always written in lower left of the element…

Q: What is the atomic mass of boron-12? A. 13.00335 amu B. 4.00260 amu C. 18.99840 amu D. --…

A: Since boron has atomic number = 5  Hence number of electrons in boron = 5 and to become neutral atom…

Q: A naturally occurring sample of an element contains only twoisotopes. The first isotope has a mass…

A: % of first isotope = 60.11 % Mass of first isotope = 68.9255 amu Mass of second isotope = 70.9247…

Q: What is the meaning of half-life of an isotope. Explain with the help of an example

A: What is the meaning of half-life of an isotope. Explain with the help of an example

Q: The atomic masses of hydrogen-2 (deuterium), helium-4, and lithium-6 are 2.014102 amu, 4.002602 amu,…

A: Atomic masses hydrogen, H = 2.014102 amu

Q: Magic numbers are associated with protons and neutrons in a nucleus. State the magic numbers for…

A: . There are many factors that give to nuclear stability.  These are,   Full nuclear shell (magic…

Q: Ch. 7-2 pg. 236 pp#1-2: Average Atomic Mass Find avg at mass Ga if 60.00% has mass 68.926 amu &…

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Q: A sample of the element Phosphorus is shown to have a mass of 33 and å charge of -3. HoW many…

A: Neutral Phosphorus having mass 30.9 P having mass 33. Atomic number of P is 15, also atomic number…

Q: Relative abundance and atomic mass of the naturally occurring isotopes of hafnium: 5% - 176 amu 19%…

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Q: In each pair of isotopes shown, indicate which one you would expect to be radioactive. 20 17 40 45…

A: Radioactivity can be defined as the process in which there is spontaneous emission of radiation in…

Q: _____→233 U 92+0 e -1 Express your answer in isotopic notation.

A: According to the law of conservation of atomic mass and number, the unknown element can be…

Q: CfY+4X nn A What is the atomic mass of the new atom? What is the atomic number of the new atom? What…

A: In nuclear reaction,  atomic number and mass number is balanced.  Balanced chemical reaction,…

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

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

Q: Berikut ini yang merupakan isoelektron dengan Na adalah Jumlah neutron Nomor massa 34 36 27 24…

A: Isoelectronic species have equal number of electrons in them. They may be cation, anion or neutral…

Q: 10. In what year did Albert Einstein prove the existence of atoms Ernest Rutherford do his Gold Foil…

A: it was Albert Einstein who, starting in his epochal year of 1905, published several papers that…

Q: The radius of Uranium-238 nucleus is about 7.44 × 10-3 pm. Calculate the density of the nucleus (in…

A: Given: The radius of uranium-238 =7.44×10-3 pm Atomic mass of uranium = 238 amu

Q: Gold has one stable isotope, whichis gold-197, with an atomic mass of 196.97amu. A 14k (14-karat)…

A: Given:   Mass of 14k gold =  5.00-g  Gold percentage  = 58.3%  Other metals        = 41.7% To find:…

Q: Genetic ift-Wikip. - Algebra Foundatio. Image result for sur. 6 Classwork What belongs in place of…

A: Given, 26Mg  Number of neutrons = ? Mass number = 26 In the periodic table the atomic number of…

Q: 4 The smallest unit of 5. The nucleus is foun

A: the nucleus is found at the centre of the atom

Q: der G Genetic drift-Wikip.. A Algebra Fouhdatio. What belongs in place of the question mark? Isotope…

A:

Q: Consider to isotopes Fe-54 and Fe-56. a. write the nuclear symbol for both isotopes. b. how do…

A: The given isotopes of iron are - Fe-54 and Fe-56 In the given information Fe represent the atomic…

Q: ABCD EF Number of electrons 8889110 9 Number of entrons 89 10 9 810 Namber of Protons 8 88 9 10 9

A: Atomic number is also known as proton number. It is represented by the symbol Z. Mass number is…

Q: 2. What is the nuclei or particle in the blank of the condensed form of * 24°Cf ( 15N, 4n)_. [A]…

A: in nuclear reaction Mass number are  conserved. That means  total mass number on reactent side is…

Q: Calculate the mass defect (g/mol) for an atom of 2914Si whose isotope mass is 28.9764949g/mol. mass…

A: We have to find mass defect

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: Determine the missing element 16S------1°e + 35 5---

A: Like all reaction, in radioactive decay reaction mass and charge balance are maintained.

Q: 30. Based on the given data, which of the subatomic particles is the lig Particle Charge Mass (kg)…

A: Atomic number = number of proton, Atomic mass = no. of proton + no.of neutron

Q: Nucleons The term nucleon refers to the particles found in the nucleus of an atom, namely protons…

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.