A fictional element Ho has two stable isotopes and an average atomic mass of 18.357 amu. Use the information in the table to calculate the mass of a 20Ho atom,      19.731 19.1990 23.260 18.455

Q: Isotopes are defined as atoms ofa. the same element with different numbers of protons.b. radioactive…

A: Atoms of the same element have the same number of protons, which is also called the atomic number.

Q: Which of the following represents isotopes?   O (mass number 18) and O (mass number 18) O (mass…

A: Isotopes are the chemical element having same atomic number but different atomic masses.  Isobars…

Q: Stuck on this question

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

Q: Find the number of electron and neutrons in the following 207pb+2 Electrons Neutrons

A: An atom is composed of three particles: electrons, protons and neutrons. The protons and neutrons…

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: Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 48.0% of the lighter…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: Fill in the blanks. Isotope 30Si4+ has: Number of protons Number of neutrons Number of electrons…

A: Given  Symbol of isotope  = Si4+30 Number of proton   = ?  Number of neutron = ?  Number of electron…

Q: An element X occurs as three stable isotopes: X-21, X-22 and X-23. X-21 is 90.48% abundant and X-22…

A: Given : Element X exists as three stable isotopes. The three isotopes are: X-21 X-22 X-23

Q: What is the atomic mass of oxygen-17 (16.9991 amu) at 0.038%

A: Using the formula We can easily get the answer

Q: You have an unknown element consisting of three stable isotopes, one with mass 19.9924 amu (90.48%),…

A: Given that: mass 1 = 19.9924 amu  % of mass 1 = 90.48 % mass 2 = 20.9939 amu % of mass 2 = 0.27 %…

Q: What is the change in mass of 180 Ta when it is formed from protons, electrons and neutrons if the…

A:

Q: Which two atoms are isotopes of one another? Atom #p* # n° #e A 10 8 B 10 9 10 9. D 11 A) A-B B) B-C…

A: Given, Atom no. of protons no. of neutrons no. of electrons A 8 10 8 B 10 9 10 C 9 9 9 D…

Q: The atomic structure of four particles are shown. electrons protons neutrons 18 17 18 Q 18 17 20 17…

A: Isoelectronic species can be defined as the species which have same number of electrons in an atom.

Q: Copper, which has an average atomic mass of 63.546 amu, has two stable isotopes: copper-63 and…

A: Given,Atomic mass of Copper-63 = 63.546 amuAbundance of Copper-63= 69.15%

Q: Question attached

A: The given isotope is C-15, which means that it has 9 neutrons. All carbon isotopes have the same…

Q: Rhenium has two naturally occurring isotopes, Re-185 (mass = 184.953 amu) and Re-187 (186.9558 amu).…

A: The average atomic mass of the substance can be determined by the addition of the masses of each…

Q: atomic number 119 and mass number of 252  where would this element be placed? What period would it…

A: Ununennium   Ununennium, also known as eka-francium or element 119, is the hypothetical…

Q: Estimate the average mass of element Y, if it is composed of two isotopes. The first isotope have a…

A: Average atomic mass = f1M1 + f2M2 +… + fnMn Where f = fraction representing the natural abundance of…

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: Provide the correct atomic symbol meeting the following conditions. 1. number of proton = 12 2.…

A: Provide the correct Atomic symbol ---

Q: The atomic masses of the two stable isotopes of boron, boron-10 (19.78 percent) and boron-11 (80.22…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: Naturally occurring bromine is composed of two isotopes: 50.69 % Br-79 (mass of 78.9183 amu) and…

A: Given,Naturally occurring bromine is composed of two isotopes:50.69 % Br-79 (mass of 78.9183 amu)…

Q: Describe how the atomic and mass numbers change, with at least one specific example?

A: An atom has a nucleus situated at the center and the electrons are surrounding it. The nucleus has…

Q: Find the number of electron and neutrons in the following: 207pb+2 Electrons Neutrons

A: The answer is given as follows: For an element    zXA Z = Atomic number = number of electron (E) =…

Q: The mass of a single atom of iron-56 is 55.93494 amu. Why is this number different from the mass of…

A: Knowledge of an atom's mass is important in chemical calculations, but the mass of a single atom in…

Q: An unknown element X has the following isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant). What…

A: Average atomic mass can be determined by the equation given below:

Q: 26. An element has 2 stable isotopes. The mass of one is 68.9257amu and its abundance is 60.4%. The…

A: The average atomic mass of an element is equal to the average of individual isotopic masses…

Q: For an isotope that has 82 protons and 124 neutrons. What is the mass number (A) and what is the…

A: Given :- number of protons = 82               number of neutrons = 124  To be calculated :-  Mass…

Q: Enter your answer in the provided box. The atomic masses of the two stable isotopes of copper, Cu…

A: Calculation of average atomic mass of cu: Average atomic mass = percentage abundance x mass of cu…

Q: Naturally occurring titanium exists as five stable isotopes. Four of the isotopes are: 46Ti with a…

A: The mass of the fifth isotope of titanium can be calculated as

Q: Copper, which has an average atomic mass of 63.546 amu, has two stable isotopes: copper-63 and…

A: Atomic mass of copper can be calculated using the following formula.

Q: On the fictional planet Zeus, boron occurs as 55.46% of 10B (atomic mass = 10.01 u) and 44.54% of…

A:

Q: You have an unknown element consisting of three stable isotopes, one with mass = 19.9924 amu…

A:

Q: Naturally occurring neon exists as three isotopes. 90.51% is Ne-20 with a mass of 19.99 amu, 0.27%…

A: To determine average atomic mass of Neon.

Q: Determine the nuclear composition (number of protons and neutrons) of the following isotopes. (a)…

A: Here, we have to calculate the number of protons and neutrons of the following isotopes: (a)…

Q: An element has two naturally occurring isotopes. One has an abundance of 51.839% and an isotopic…

A:

Q: Naturally occurring bromine is composed of two isotopes: 50.69 % Br-79 (mass of 78.9183 amu) and…

A: Given:Isotopes of Bromine :  50.69 % Br-79 (mass of 78.9183 amu) and…

Q: There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 10.93%. Now…

A:

Q: There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.63%. Now…

A:

Q: The average atomic mass of Ga is 69.72. Naturally occurring Ga is composed of Ga-69, which has an…

A:

Q: Positively charged particles of radiation emitted from the decay of radioactive substances are known…

A: Nuclear or radiation decay are primarily of three types: alpha, beta and gamma decay. Alpha…

Q: mass number and atomic number of the alpha particle

A:

Q: An unknown element X has the following isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant). What…

A: Average atomic mass of X can be calculated as  Average atomic mass of X = ( Atomic mass of ²⁵X * %…

Q: Calculate the mass in grams of 1 mole of neutrons given the following conversion factors: 1 n° =…

A: Consider the given information is as follows; 1 n0 = 1.008665 amu1 amu = 1.660538×10-24 g1 mole =…

Q: Element X has two isotopes. The first isotope has a natural abundance of 80% and has a mass of 60…

A: Given : Abundance of first isotope = 80% Mass of first isotope = 60 amu Abundance of second isotope…

Q: What is the mass (in grams) of one Ni-58

A: Given is number of atom = 1 Mole represent the quantity of fundamental particle.

Q: A certain element consists of two stable isotopes. The first has a mass of 68.9 amu and a percent…

A:

Q: Copper has two naturally occurring isotopes: 69.17% of Cu-63 (mass 62.93 amu) and 30.83% of Cu-65…

A: Average atomic mass of Cu = [(% abundance of Cu-63 x Mass of Cu-63) +(% abundance of Cu-65 x Mass of…

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.