Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 58.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

Q: Three magnesium isotopes have atomic masses and relative abundances of 23.985 amu (79.99%), 24.986…

A: The atomic of an element = Σ Atomic mass ( Isotope ai ) X Abundance (Isotope ai) Atomic masses and…

Q: Which statement about subatomic particles are true? If an atom has an equal number of protons and…

A: This is a true statement because the charge of the proton and the electron are equal in magnitude…

Q: Determine the number of protons, number of electrons, number of neutrons, atomic number, and mass…

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

Q: Of the three subatomic particles, a(n)  has a charge but negligible mass, whereas a neutron has mass…

A: To find: From the subatomic particles : a) n has a charge but negligible mass b) a neutron has mass…

Q: . An element has three stable isotopes with masses of 27.977 amu, 28,976 amu, and 29.973 amu. The…

A:

Q: The water found on Earth is almost entirely made up of the 'H and 1°0 isotopes for a formula of H20…

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

Q: A new element, greenriverium (Gr), has three naturally-occurring isotopes. Isotope 1 has a mass of…

A: The atomic mass is the average mass of all the isotopes. So that we calculate the average mass with…

Q: Two compounds of Cl and X are found to have molecular masses and % Cl, by mass, as follows: 137…

A: In first compound, Cl is 77.5 % and the total mass of the compound is 137 u. Calculate the mass of…

Q: In a naturally occurring sample, 19.8% of boron atoms have five neutrons and 80.2% have six…

A:

Q: Consider the following atoms in which X represents the chemical symbol of the element:11/22X,…

A: In an atom of the element, there is a nucleus present in the center.  protons and neutrons are…

Q: A sample of atoms has an average atomic mass of 188.2 amu. If this sample consists of two naturally…

A:

Q: Bromine has two naturally occurring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu.…

A: The given data contains, Atomic mass of Br = 79.904 amu. mass of isotope 81Br = 80.9163…

Q: the number of copper atoms in 3.0 g lump of copper is 2.8 x 1022. how many electrons are present in…

A: Given: Number of copper atoms in 3.0 g lump of copper is 2.8 x 1022.

Q: Discuss the significance of assigning an atomic mass of exactly 12 amu to the carbon-12 isotope.

A: The significance of assigning an atomic mass of exactly 12 amu to the carbon-12 isotope has to be…

Q: Uranium exists mainly as two isotopes in nature, possessing mass numbers 235 and 238. Write the full…

A: The atomic number of Uranium is 92. Hence number of protons in both isotopes = atomic number = 92

Q: Which symbol represents the atom having 28 protons and 34 neutrons in its nucleus?

A: Atomic number: The atomic number (represented by the letter Z) of an element is the number of…

Q: Chlorine has two naturally occurring isotopes, 35Cl and 37Cl. What is the mass number of each…

A: To find: The mass number of each isotope. Number of protons, neutrons and electrons are present in…

Q: Iron exists in nature as a mixture of predominantly three isotopes: ⁵⁴₂₆Fe (53.94 amu), ⁵⁶₂₆Fe…

A: We have to calculate the percentage of rarest of three isotopes.

Q: Gallium is a metal which forms compounds with a wide variety of uses. Some of the applications of…

A: Given: There are two naturally occurring isotopes of Ga. Isotopic mass of 71Ga = 70.9247050 amu. And…

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: An unknown element X has the following isotopes: 25X (80.50% abundant, mass = 25.03 amu) and 27X…

A: isotopes of X 25X: abundance - 80.50%                       (P1) = 80.50/100 = 0.8050          mass…

Q: How many protons, neutrons and electrons are present in an atom of 40Ca and 119Sn ?

A: The atoms considered are 40Ca and 119Sn.

Q: An ion that consists of 16 protons, 32 neutrons, and 18 electrons has:

A: The atom consist of 3 particles-  1- electron 2- proton 3- neutron

Q: Which pair of atoms constitutes a pair of isotopes of the same element? 29. 14 28 58 B) X 26 A) X…

A: Isotopes are defined as the elements having same atomic number but different mass number.  X1328…

Q: The amount of carbon-14 in ancient artifacts and fossils is oftenused to establish their age.…

A:

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: What mass of nickel would contain 5.66 x 1021 atoms?

A:

Q: Three of the isotopes of Tellurium, Te, have mass numbers of 124, 126, and 130. Tellurium-124 has 52…

A: Isotope label is same as isotope notation and is written as follows: Xnm  is the isotope label where…

Q: An atom containing 19 protons, 20 neutrons, and 19 electrons has a mass number of?

A: Given, Number of protons = 19 Number of electrons = 19 Number of neutrons = 20

Q: Neutral particles are called: Particles that have a charge are called: Particles of the same element…

A: Here is the answer

Q: How many protons, electrons, and neutrons are present in an atom of 52/24Cr?

A: An atom is composed of three main sub-atomic particles; electrons, neutrons and protons. The atomic…

Q: Vanadium has two naturally occurring isotopes, "V with an atomic mass of 49.9472 amu and $'V with an…

A:

Q: The atomic masses of 10B and 11B are 10.0129 amu and 11.0093 amu, respectively. Calculate the…

A: The atomic masses of B10 and B11 are 10.0129 and 11.0093 respectivelyLet their natural abundances be…

Q: Estimate the percentage of the total mass of a atom that is due to (a) electrons, (b) protons, and…

A: Dear student, you have not mentioned the atom for which the mentioned percentage is required. I am…

Q: What is the name of the following atoms a) an atom? with 3 protons and 4 neutrons.

A: Given that, a)an atom with 3 protons and 4 netrons What is the name of it?

Q: what is the mass of 7.15 x 10^22 aluminum atoms?

A: Given, Number of Aluminium atoms = 7.15×1022

Q: Naturally occurring chlorine (Cl) consists of 2 isotopes, 35Cl and 37Cl. Their relative abundances…

A:

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: Iron exists in nature as a mixture of predominantly three isotopes: 54, (53.94 amu), 5® 26FE (55.93…

A:

Q: What is isotope? Why is isotope notation important?

A: An element can be represented by the notation XZA, where X corresponds to the chemical symbol, Z…

Q: Currently, the atomic mass unit (amu) is based on being exactly one-twelfth the mass of a carbon-12…

A: The mass of an atom is not only due to the sum of the masses of the neutrons, protons and electrons…

Q: Chlorine has two naturally occurring isotopes, ³⁵Cl and ³⁷Cl.What is the mass number of each…

A: Number of proton present in a neutral element = Number of electron present in that neutral element =…

Q: What is the mass of (2.66x10^21) platinum atoms?

A: Given, Number of Platinum atoms = 2.66×1021

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: 1. Given the data in table shown below, calculate the atomic mass of unknown element X. Then,…

A: The average atomic mass of element is equal to the product of the masses of the isotope and its…

Q: An element X has two common isotopes: X-57 and X-59. If the average atomic mass of element X is…

A: An element has two isotopes : X-57 and X-59 Average Atomic mass = 58.876 amu

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.