A certain ion X3+ contains 21 electrons and 29 neutrons Identify an ion? what is the mass number of this ion?

Q: What is the mass of 4.91×10214.91×1021 platinum atoms?

A: For  calculating the mass of substance , we have the governing equation  m=NA×Molecular weight ,…

Q: 2.21 Calculate the number of neutrons of 23°Pu.

A: Number of neutrons is given by the difference of mass number and atomic number.

Q: How many protons, neutrons and electrons are there in a neutral atom of the isotope of chlorine…

A: Calculation of protons, neutrons and electrons present in neutral atom: The given compound is…

Q: A carbon atom has a mass number of 12 and an atomic number of 6. How many neutrons does it have?

A: The atomic no. of the atom can be described as the total no. of protons that are present in the…

Q: Beryllium has an atomic number of 4 and a mass number of 10. From this you can determine Beryllium…

A:

Q: Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass = 23.9850 amu, abundance =…

A: Given data contains, Isotopic mass of 24Mg is 23.9850 amu. Abundance is 78.99%. Isotopic mass of…

Q: What is the mass number of an atom that contains a. 42 protons, 42 electrons, and 53 neutrons? b. 24…

A: a. 42 protons, 42 electrons, and 53 neutrons? b. 24 protons, 24 electrons, and 28 neutrons? To find…

Q: j. How is the mass number related to the number of protons, neutrons, and/or electrons? k. Potassium…

A: j) Mass no. is the sum total of no. of protons and neutrons. Mass no.=no. of protons+no. of neutrons…

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: Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass = 23.9850 amu, abundance =…

A: Given data contains, Isotopic mass of 24Mg is 23.9850 amu. Abundance of 24Mg is 78.99%. Isotopic…

Q: 1. What is the mass number of a potassium (K) atom that has 20 neutrons?

A: Atomic number (Z) = Number of protons Mass number = number of protons + number of neutrons

Q: Two radioactive isotopes of iodine used for the diagnosis and treatment of thyroid disease have mass…

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

Q: What is the mass number (A) of an iron atom that has 31 neutrons?

A: Mass number is equal to the sum of the number of protons and the number of neutrons.

Q: Lithium has two naturally occurring isotopes: Li-6 (natural abundance 7.5%) and Li-7 (natural…

A: Given information,    Li-6 (natural abundance 7.5%) and Li-7 (natural abundance 92.5%).

Q: Question 1: Determine the atomic mass of lithium, given the following information. Mass (amu) 6Li…

A: Applying formula Atomic weight=%of A ×atomic weight of A + %of B ×atomic weight of B /sum of %

Q: Naturally occurring gallium consists of two isotopes. One of those isotopes is "Ga with an isotopic…

A: Gallium has indeed two isotopes, one of them is as you mentioned the G71a.Its isotpic mass being…

Q: Complete the table below by filling the blanks with the correct value. Mass Atomic Number Symbol Mo…

A: Number of protons in an atom is equal to the atomic number of atom  For a neutral atom, number of…

Q: What is the atomic number for an element whose mass number is 138, which contains 80 neutrons per…

A: Given : Mass number = 138  And number of neutrons in 1 atom = 80

Q: Oxygen has three isotopes, 16O, 17O, and 18O. The atomic number of oxygen is 8. How many protons and…

A: Isotopes are variants of a particular chemical element which differ in neutron number, and…

Q: Consider an ion Cr2+  that has a mass number of 54.   How many protons? How many electrons? How…

A: Given. Atomic mass of Cr = 54 ion = Cr2+

Q: The numbers of protons, neutrons, and electrons in the 23 Na isotope, respectively, are: 11 اختر…

A:

Q: Magnesium has three isotopes with mass numbers 24, 25, and 26. (a) Write the complete chemical…

A: Atomic number (Z) is defined as a number of protons present in an atom.  In a neutral atom number of…

Q: How many protons, electrons and neutrons are in 34S2-? Number of protons ______________   Number of…

A: 34S2- Atomic No. = 16 Mass No. = 34 The atomic number specifies the number of protons, positively…

Q: In a sample of nitrogen, there is 99.63% N-14 atoms and 0.37% of N-15 atoms. What is the atomic mass…

A:

Q: An atom has a net charge of -1. It has 18 electrons and 20 neutrons. Give: (i) The number of protons…

A: Given that, an atom has a net charge of -1. It has 18 electrons and 20 neutrons. We have to…

Q: An element of unknown atomic mass has only two naturally occurring isotopes: 69X (68.935 amu,…

A:

Q: An ion of platinum has a mass number of 195 and contains 74 electrons. How many protons and neutrons…

A: Given data: The mass number of platinum ion=195 Number of electrons present in platinum ion=74 To…

Q: 3) Silicon has three naturally occurring isotopes: Si-28 with mass 27.9769 amu and a natural…

A: To get the average atomic mass of silicon, we take the atomic mass of each isotope and then multiply…

Q: Magnesium has three isotopes that contain 12, 13, and 14 neutrons. For each isotope give the…

A: The protons, neutrons, and electrons are the salient features of an atom. The protons present in the…

Q: The first has a mass of 121 u and a percent natural abundance of 57.3 %. The second has a mass of…

A:

Q: The nucleus of an atom contains 56 neutrons.  The atom contains 43 electrons.  What element is it…

A: Given, Number of neutrons = 56 Number of electrons = 43 To calculate the mass number and to find…

Q: Question attached

A: Number of protons in an isotope is same to its atomic number and it is equal to the atomic number of…

Q: Calculate the atomic mass of element "X", if it has 2 naturally occurring isotopes with the…

A: Given that : Isotopic mass of X-39(m1) = 38.70 amu Abundance (A1) = 33.00% Isotopic mass of X-41(m2)…

Q: Use the element box for potassium to fill in the missing information. 19 K Protons = Type here…

A: Given: Element box of Potassium:

Q: Copper has two naturally occurring isotopes, 63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic…

A: Given,Mass of 63Cu (isotope I) = 62.9396 amuMass of 65Cu (isotope II) = 64.9278 amuAtomic mass of Cu…

Q: An element from the Periodic Table is shown below. The atomic mass is given. A) Give the Name,…

A: Atomic mass: Atomic mass of an element is the total number of protons and neutrons present in the…

Q: Find the number of electron and neutrons in the following: 195Pt+2 Electrons Neutrons

A: The number of neutrons = (The mass number - the proton number)

Q: what is the average atomic mass for a hypothetical element that has two isotopes with relative…

A: Given two isotopes with relative masses and % abundances as follows: 12.2 amu, 25%; and 13.3 amu,…

Q: 4/2He+2has how many protons, neutrons, and electrons?

A: Consider the relation between atomic number, number of protons and number electrons in the neutral…

Q: SUBATOMIC PARTICLES AND ISOTOPES Complete Symbol Mass Number Number of Protons Atomic Number of…

A: Given subparts: 7. Element name: Bromine Mass number = 80 Complete symbol=? Atomic number=? Number…

Q: 1. Silver has two naturally occurring isotopes with the following isotopic masses: 107 107 47 Ar…

A: Answer: To solve this question we have to use the relation between average atomic mass and %…

Q: OXYGEN Atomic Number: Atomic Mass: # cf Protons: # of Electrons: # of Neutrons: 1 1

A: Atomic number of an element = Number of protons = Number of electrons Mass number = Number of…

Q: Silver has two naturally occurring isotopes, 107Ag (isotopic mass 106.90509 amu) and 109Ag (isotopic…

A: Assuming the percent abundance of 109Ag isotope is y. Hence the percent abundance of 107Ag isotope…

Q: Antimony has two naturally occurring isotopes: 121Sb (isotopic mass 120.904 amu) and 123Sb (isotopic…

A: If A1 and A2 atomic masses of two isotopes of an element with X1 and X2 as their percentage…

Q: How many neutrons are there in this element?

A: Given : We have to tell number of neutrons in the given element.

Q: (a) 63Cu Protons Neutrons Electrons

A: Given :- (a) 63Cu  (b) 32S  To determine ;  total protons,electrons and neutrons in above cases

Q: element atomic # mass # p+ е- n0 Ne 20 Na 23 28 31 207 125 277 112 17 18 6. 137 81 Rn 224 43 98

A: Filling the table

Q: Complete the following table: Symbol Protons Neutrons Electrons Mass Number Charge 1735CI 3064Zn 2+…

A: Formula used  Proton+neutron=mass number  Electron = proton+charge if charge is negative  Electron=…

Q: Write the complete symbol, including mass number and atomic number, for each atom? Contains 15…

A: The atomic number of an element is the number of protons in the nucleus of an atom or it is the…

Group 14 Elements

The following elements come under group 14 of the periodic table.