Write the element symbol that fi ts each description, using a superscript for the mass number and a subscript for the atomic number. a. an element that contains 53 protons and 74 neutrons b. an element with 35 electrons and a mass number of 79 c. an element with 47 protons and 60 neutrons

Q: 1. Changing the number of positively charged protons in the nucleus of an element would form T a) a…

A: 1) an atom consist of positive charge proton , negative charge  electron and neutral neutron  Atomic…

Q: 28. I A certain element consists of two stable isotopes. The first has an atomic mass of 137.9068…

A:

Q: The explosion of an atomic bomb in the atmosphere releases many radioactive isotopes into the…

A: The explosion of atomic bomb occurs as a result of rapid release of energy from a high speed nuclear…

Q: Which statement is true?(a) For a given element, the size of an isotope with more neutrons is larger…

A: For a given element, atoms having same atomic number with different mass number are known as…

Q: Is the statement consistent with Rutherford’s nuclear theory as it was originally stated? Why? The…

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

Q: The relative atomic mass of antimony is 121,8. Antimony exists as two isotopes - antimony 121 and…

A: Given, The relative atomic mass of antimony is 121.8 and it's two isotopes  antimony 121 and…

Q: The size of atoms generally increases as the number of   A. protons increases.   B.…

A: The size of atoms generally increases as the number of A.Protons increases. B.Neutrons in atoms…

Q: utral radium atom has a mass of 226 (atomic number 88) it would have neutro electrons.

A: The question is based on concept of atomic structure. We have  to calculate correct  number of…

Q: What letters are used to designate atomic number and mass number in isotopic notation of atoms?

A: There are different symbols are used to exhibit atomic Number and mass number of atoms. Atomic…

Q: A certain element exists as three different isotopes, 29.1% of all the isotopes have a mass of 75.23…

A: The average atomic mass can be calculated by using Following formula - AAM = (Mass of 1st isotope×%…

Q: 1. Complete the following table: Symbol # protons # neutrons # electrons Mass Atomic number Number…

A: The atomic number is the number of protons or electrons present in the element. The atomic mass…

Q: An atom has a mass number of 30 and 16 neutrons. What is the atomic number of this aton Express your…

A:

Q: First to organize the elements by atomic mass; noticed patterns in every 8th element; law of…

A: CORRECT choices are:- NEWLANDS SEABORG

Q: 21. What force holds electrons near the nucleus of the atom? A. Strong nuclear force B.…

A: From the concept of periodic trends of elements and atomic mass of elements the following questions…

Q: 1. Determine the number of protons, neutrons and electrons F-20 , a radioactive isotope of fluorine.…

A: 1) The isotope given is F-20.

Q: What most likely explains why the chemical symbol for calcium is? A. The symbol was already used for…

A: Calcium is discovered by Humphry Davy in 1808. It belongs to group 2 of the periodic table with an…

Q: Briefly describe(a) the law of conservation of mass(b) Rutherford’s nuclear atom(c) weighted-average…

A: (a) the law of conservation of mass(b) Rutherford’s nuclear atom(c) weighted-average atomic mass(d)…

Q: Consider two elements: one is a gas and the other is a solid. Each contain identical number of…

A: If two elements have same number of electrons in their outer shell(valance shell) then the atoms…

Q: An atom of gadolinium has an atomic number of 64 anda mass number of 153. How many electrons,…

A: Gadolinium element belongs to the F-block element with the atomic number 64 and atomic mass 153 g.…

Q: 26) An element has two isotopes. One has an atomic mass of 68.93 amu and a natural abundance of…

A:

Q: "the atom with 38 protons and 49 neutrons"

A: Given,        Number of protons = 38         Number of neutrons = 49  Assume an atom is 'X'

Q: Directions: Use the clues to fill in the words. Words can go across or down. Letters are shared when…

A: ACROSS  2. Nucleus 5. Gold  6. Rutherford

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

A: The answer is given as follows

Q: A naturally occurring sample of an element contains only two isotopes. The first isotope has a mass…

A: The atomic mass of an element is defined as the weighted average mass approximately equal to the…

Q: 10. How are elements organized on he Periodic Table of Elements? A increasing atomic mass B…

A: The periodic table (the modern one) is framed based on the modern periodic law which state that the…

Q: Explain why the atomic mass of an element is an average mass

A:

Q: Fill in the blanks:a. Isotopes of an element differ in mass because the atomshave a different number…

A: The complete statements have to be provided.

Q: 24.1% of all isotopes of an element have a mass of 75.23 amu. 48.7% have a mass of 74.61 amu and…

A:

Q: To the right is a representation of 50 atoms of a fictitious element called westmontium (Wt). The…

A: No. of atoms of each isotope are as follows: Wt-296 (red) 36 Wt-297 (blue) 2 Wt-298 (green)…

Q: A. Atomic number of Terbium B. Mass number of Carbon C. Element with atomic number 113

A: Given, A. Atomic number of Terbium = ? B. Mass number of Carbon = ? C. Element with atomic number…

Q: an isotope that has the atomic number 53, atomic mass 127 and a charge of "-1" determine the number…

A: Elements have same atomic number but different mass number is known as Isotopes

Q: The nucleus of an atom accounts for most of the size and mass of the atom. O very little of the size…

A: According to Dalton's atomic theory, compound is formed by combining elements and it's also based on…

Q: 31. Isotopes of an element have the same number of (1), and different number of _(2). A. neutrons…

A:

Q: A naturally occurring sample of an element contains only two isotopes. The first isotope has a mass…

A:

Q: An isotope has a mass number of 13 and an atomic number of 6. How many neutrons does this isotope…

A: Number of neutrons =  Mass number - Atomic Number

Q: Timothy is studying atoms in school. He creates a chart Number to organize of information Neutrons…

A: We do have three sub atomic particles, namely electrons, protons and neutrons with " -1 ,+1 and 0 "…

Q: The atomic mass of the imaginary element Doginium is 15.542 amu. Doginium has two isotopes:…

A:

Q: 1. According to modern atomic theory, what is the specific location of a neutron within an atom? a.…

A: Given: Sub-atomic particle is neutron.

Q: what is atomic mass? how is it computed

A: what is atomic mass? how is it computed?

Q: Which pair correctly matches an element to its atomic number? O a) 9.012 - Be O b) 12.01 - C c)…

A: The atomic number of an element is equal to the total number of protons in the nucleus of the…

Q: 17.A hypothetical element X is found to have an atomic mass of 37.45 amu. Element X has 2 isotopes,…

A: Given that mass of X-37 = 37.24   Let x be the mass of the other isotope  Fractional abundance of…

Q: Fill in the empty cells. Isotopic Symbol Element atomic Symbol number mass # of # of # of number…

A: Atom consist the mainly three sub atomic particles, that are electron, proton and neutron. Electron…

Q: 1. Determine the number of protons, neutrons and electrons F-20 , a radioactive isotope of fluorine…

A: 1) The isotope given is F-20.

Q: A helium atom consists of two protons, two electrons and Iwo neutrons. In the helium atom, the…

A:

Q: Element A has two isotopes. The first isotope is present 19.41% of the time and has a mass of…

A: In this question, we want to determine the atomic mass of element A  How we can calculate, you can…

Q: unisauaPIAL :ua ar Number of Neutrons Number of Abundance Abundance Name of isotope Mass (amu) (%)…

A: Mass number is sum of protons and neutrons in a nucleus.

Q: Part B The atomic number of carbon is 6. What is the mass number of a carbon atom with 5 neutrons?…

A: Given that, Atomic number of C=6 No. of neutron=5 so,