(i) (ii) (iii) (iv) 19 19 20 19 21 19 20

Q: For each pair of elements listed, predict which one has more stable isotopes. b) For Se b) Co or Ni…

A: (a) F or Se : Atomic number of F = 9, so it has 9 protons, and its mass number is 19. Atomic number…

Q: As the number of protons and neutrons in the nucleus increases, clements are much less likely to…

A:

Q: Sketch a modern atomic model of a typicalatom and identify where each type of subatomic…

A: Atomic model is given by many scientists as Bohr's model, Rutherford model etc. Modern atomic model…

Q: Which of the following is considered to be radioactive isotope of hydrogen? Also give the names of…

A: Amongst the three isotopes of hydrogen, 1H is the most stable isotope with abundance of 99.98%. 2H…

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

A:

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: 23U → 23Th + He 2. For each element, what do the top (superscripted) and the bottom (subscripted)…

A: Introduction: In the above reaction nucleus of uranium undergoes alpha decay ,in this nuclear change…

Q: Give the nuclear symbol for the isotope of phosphorus for which A = 31 ?

A: The element given is phosphorous with mass number as 31.

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: Gallium (Ga) consists of two naturally occurring isotopeswith masses of 68.926 and 70.925 amu. (a)…

A: (a) The atomic number of gallium is 31. Thus, all isotopes of this element (gallium-69 and…

Q: Identify the features of the nucleus ofan atom, and discuss the properties ofprotons, neutrons, and…

A: Nucleus is a massive positively charged present at the centre of the atom. It contains protons and…

Q: if the atomic symbol 13354Xe, what is the mass #, # of protons, and # of neutrons?

A: The symbol of an element is given by the expression XZA, where Z is the atomic number and A is the…

Q: Which is the more abundant isotope of copper, 63Cu or 65Cu?(a )63Cu(b) 65Cu

A: Which is the more abundant isotope of copper, 63Cu or 65Cu?

Q: Part C 98 43 Enter your answers numerically separated by a comma. ? ....... Np, Nn = protons,…

A: The question is based on the concept of atomic structure. We have to identify number of subatomic…

Q: The following are selected properties of the most abun- dant isotope of a particular element. Which…

A: Concept Introduction: Atoms are made up of even smaller particles. These particles are very small…

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

A:

Q: How many protons are in the nucleus of an atom of each.( put  between each number ex, 12,24,10,5,3…

A: An atom can be considered as the smallest unit of any matter. An atom is composed of certain…

Q: what is the diameter of the “atom” with a nucleus this size?

A:

Q: Which of the following statements is not correct about the stability of nucleus? a. The stable…

A: all elements with more than 83 protons such as uranium, radium, and polonium have unstable nuclei.…

Q: A rough estimate of the radius of a nucleus is provided by the formula r 5 kA1/3, where k is…

A: The given radius is: where k is the Fermi constant (1.3×10-13cm) and A is the mass no. of Iodine…

Q: Silver has two isotopes that are common  in nature. Ag - 107 and  Ag - 109. What  makesthese  two…

A: The solution is given below -

Q: in nature, element X is found as a mixture of two isotopes, one with mass number 107 and the other…

A:

Q: Arrange the following atoms by increasing number of neutrons. 134Ba, 134Ce, 134Xe

A: Given:

Q: Write the nuclear symbols of the three isotopes of an element with an atomic number of 8 in which…

A: We have to write Atomic symbol for three isotopes of atomic number 8.

Q: Show that the neutron number for the following nuclides generally exceeds the atomic number for…

A: Atomic number (Z) = number of protons (p) Mass number (A) = number of peoton (p) + number of…

Q: what is the atomic number for 37Cl with a charge -1

A: Given that, Cl-37 Charge = -1

Q: The 18O:16O abundance ratio in some meteorites is greater than that used to calculate the average…

A: The average atomic mass formula is given as: Average atomic mass=∑i=1n(Atomic mass of an isotope x…

Q: Bucks McGee, after being poisoned, is currently being treated in the hospilal antidote- the chemical…

A: Antidote compound name = Prussian Blue The molecular weight of the antidote compound = 858.9 g/mol…

Q: Write the symbolic notation of an isotope of an element having 8 protons, 8 electrons, and 11…

A: The symbolic notation of an isotope of an element having 8 protons, 8 electrons, and 11 neutrons

Q: Visited (Atomic masses: iron-56 = 55.9349 amu; hydrogen-1 = 1.0078 amu; mass of neutron = 1.0087…

A:

Q: Which of the following statements best describes the role of neutrons in the nucleus? The neutrons…

A: The atom is smallest particle of any element that exists. The atom itself is composed of three…

Q: The stability of any nucleus is determined by the difference between the repulsion and the short-…

A: According to question 4th option is  not correct that is All isotopes of the elements with atomic…

Q: Determine the number of protons and the number of neutrons in isotope. 99Tc43

A: General representation of an element - AXZ were, X = Symbol of an element. A = Mass number. Z =…

Q: For the 19O2- Isotope identify the number of Protons,  Neutrons,  Electrons

A: For a general element, XZA Z- atomic number = number of protons A- mass number = number of protons +…

Q: Chiorine exists in natute aga mixture ot stable isotopes ,cl-35 and ct-37:74 the atomic magg of…

A:

Q: mass spectrometer is being used to separate common oxygen-16 from the much rarer oxygen-18, taken…

A:

Q: 6. Tungsten is atomic number 74 on the Periodic Table. Supply the indicated information for a…

A: Given,  Atomic number of Tungsten = 74  184W  mass number = 184

Q: d) how many 4°K atoms are present in a piece of copper block weighing 615 g? The percent isotope…

A: 12. d) The mass of the copper block is = 615 g The percent of 40K isotope is = 12.05 % The number of…

Q: 6. No element exists with mass number larger than about 300. Explain Why?

A:

Q: Copper has two stable isotopes with the following atomic masses: copper-63 (atomic mass = 62.9296…

A: Given: average atomic mass of copper = 63.546 amu atomic mass of copper-63 = 62.9296 amu atomic mass…

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

A:

Q: From the following nuclei identify and group the nuclei that are isotopes, isotones or isobars:…

A: Isotopes are elements with same number atomic number but different mass number. Isobars are element…

Q: Draw the nuclear symbols for the three isotopes of carbon. Besides the symbol, what is common to all…

A: Isotopes are atoms of same elements which have same atomic number but different mass number. In…

Q: 6) What are the circular paths around the nucleus where electrons revolve? 7) There is an X element…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: I3 write a hypothesis for how you think that decay constant is related to the concentration of the…

A: The decay constant(λ) regulates the rate at which the total number of nuclei declines. Unknown…

Q: 165 21. Identify the neutron-to-proton ratio for the isotope 67H0 and determine if the isotope is…

A: Identify the neutron-to-proton ratio in the given nuclide--

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.