(i) What is the mass of a neutron? (ii) What is the charge of a neutron?

Q: An element with an average atomic mass of 17.673 amu has two naturally occuring isotopes If one…

A: Given:- Average atomic mass = 17.673 amu  Mass & abundance of one isotope = 18.731 amu &…

Q: Distinguish among the types, locations, and charges of subatomic particles.

A: Protons, neutrons are electrons  that are the three fundamental subatomic particles present in the…

Q: When does the number of Neutrons vary?

A: An atom consits of the electron,proton and neutron. The atomic mass of the atom depends upon the…

Q: 103 A neutral atom of rhodium-103 (0Rh) contains how many protons, neutrons, and electrons?

A: Given,  A neutral atom = Rhodium  (a). How many protons = ? (b). How many electrons = ? (c). How…

Q: What is the mass number of an isotope with an atomic number of 56 and that has 75 neutrons?

A: Mass number is the atomic mass of an atom. It is the sum of no of protons and no of neutrons present…

Q: What are the atomic number (Z), mass number (A), and symbol of the chlorine isotope with 18…

A: Isotopes are elements with same number of protons but having different number of neutrons. Isotopes…

Q: How many protons, neutrons,and electrons are there in an atom of (a) 10 5B, (b) 36Ar, (c) 8538Sr,…

A: An atom consists of sub-atomic particles which are protons, neutrons (both present inside the…

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: What is the number of neutrons in I-131?

A: Given, Element : I-131 Number of neutrons = ? Note: In the modern periodic table, iodine (I) belongs…

Q: How many neutrons are there in an atom of lead whose mass number is 208?

A: Given: mass number is 208 To find: number of neutrons

Q: What is the mass number of a phosphorous (P) atom with 17 neutrons?

A:

Q: What is the mass number (A) of a calcium isotope that has 19 neutrons?

A: Answer :-  The mass number (A) of a Calcium isotope that has 19 neutrons = 39…

Q: What is an atomic mass unit? Why is it necessary to introduce such a unit?

A: Matters are the substances that possess some mass and volume. These are formed by joining very small…

Q: Roughly speaking, the radius of an atom is about 10,000times greater than that of its nucleus. If an…

A: The radius of the atom in miles has to be given,

Q: What is the difference between the atomic mass and the atomic weight?

A:

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: What is the atomic number for an element whose mass number is 196, which contains 116 neutrons per…

A: Given : mass number of element =196.                   Number of neutrons =116 To find : Atomic…

Q: Prior to 1961, the atomic mass standard was defined as 1/16 ofthe mass of ¹⁶O. Based on that…

A:

Q: 2. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. What does…

A: Answer: 75 Proton and 110 Neutron. Given,Element of Rhenium (Re) exist as two stable isotopes and 18…

Q: Why was it more difficult to discover neutrons than protons or electrons?

A: Neutrons was discovered by James Chadwick in 1932, after the discovery of electrons and protons.

Q: What is the atomic number of an element whose mass number is 78, which contain 50 neutrons per atom?

A: The atomic number of an element represents the total number of protons present in the nucleus of the…

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: 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: There are two naturally occurring isotopes of B- boron. One has an atomic mass of 10.013 amu and a…

A:

Q: What is the atomic mass of Lithium, if 7.49%  is Li-6 and 92.51% of Li-7?

A: Given, The natural abundance of Li-6 = 7.49 % The natural abundance of Li-7 = 92.51 %   Considering,…

Q: Which statement about subatomic particles are false? Protons have about the same mass as neutrons.

A: An atom is made up of subatomic particles which are protons, neutrons and electrons.

Q: An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass…

A: Two naturally occurring isotopes.i. Abundance of 37.4% and an isotopic mass of 184.953 amuii.…

Q: What is the mass number of an atom of calcium that has 21 neutrons?

A: We know ,  Mass number of an atom = number of proton + number of neutron

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: What data must you know about the isotopes of an element to calculate the atomic mass of the…

A: The elements that have different atomic mass and same atomic number are known as isotopes.

Q: How many electrons does it take to equal the mass of a proton?

A: An atom is made up of three subatomic particles. These are known as protons and neutrons that are…

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: What is the mass in amu of a carbon-12 atom?  Why is the atomic weight of carbon reported as 12.011…

A: The mass in amu of a carbon-12 atom is 12amu.

Q: If a sample of gallium contains 1.56×104 atoms of gallium-69 and 1.02×104 atoms of gallium-71, what…

A: Given,1.56×104 atoms of gallium 69.1.02×104 atoms of gallium 71.

Q: In what way are isotopes of a given element always different? In what way(s) are they always the…

A:

Q: A single atom of element Q has a mass of 1.09 x 10 -22 g. What is the name of the element Q?

A: Given : Mass of single atom of element = 1.09 X 10-22 g Assuming atomic mass of element is M.

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: If a sample of silver contains 1.29×104 atoms of silver-107 and 1.20×104 atoms of silver-109, what…

A: The percentage of silver-109 in the sample can be calculated by using the formula Percentage of…

Q: a. How many protons are in the nucleus of the isotopeIn-115?b. How many neutrons are in the nucleus…

A: a. How many protons are in the nucleus of the isotope In-115? b. How many neutrons are in the…

Q: What is the proper way to write an atom with 17 protons and 20 neutrons?

A: An atom basically consists of proton, neutrons and electrons. The protons and neutrons are present…

Q: How many neutrons are there in an atom of iron with a mass number of 52?

A:

Q: What is the mass number for an atom of osmium containing 76 protons and 112 neutrons?

A: The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of…

Q: What element has a mass number of 9 and has five neutrons in its nucleus?

A:

Q: How many electrons, protons, and neutrons are there in an atom ofa40Ca?

A: In the atom 40 Ca,  Atomic number = 40  So, proton number = 40  As it is neutral so,  Electron…

Q: How do the terms atomic mass and atomic weight differ?

A: Atomic mass and atomic weight, both the terms are used for measurement of its quantity.

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

A:

Q: What is mass number of a Ne atom that has 14 neutrons?

A: Symbol of an element as listed in periodic table has two numerals written with it. The one on…

Q: When the Number of Neutrons Varies?

A: Atomic number (Z)- the number of protons or electrons present in an atom of element called as atomic…

Q: How many protons are there in the nucleus of Cu-64?

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

Group 14 Elements

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