The following diagram is a representation of 20 atoms ofa fictitious element, which we will call nevadium (Nv).The red spheres are 293Nv, and the blue spheres are 295Nv.(a) Assuming that this sample is a statistically representativesample of the element, calculate the percent abundanceof each element. (b) If the mass of 293Nv is 293.15 amu andthat of 295Nv is 295.15 amu, what is the atomic weight of Nv?

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: The first atoms of seaborgium (Sg) were identified in 1974.The longest-lived isotope of Sg has a…

A: (a) we are asked to give the of protons electrons and neutrons in the given atom 266Sg  The number…

Q: While roaming a parallel universe, you discover the hypothetical element "Z." You obtain a…

A: We need to calculate the atomic weight of the element Z.

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Q: Only two isotopes of boron (B) occur in nature; theiratomic masses and abundances are given in the…

A: Concept introduction: Isotope is defined as atoms of same element with same atomic number but…

Q: You are an element capable of producing oxygen when fused with you own kind, which element are you

A: Oxygen is a diatomic gas.

Q: 2. A naturally occurring same of an element consists of two isotopes, one of mass 85 and one of mass…

A: The average atomic mass of an element is the weighted average mass of an atoms in a naturally…

Q: 7. The natural distribution of the isotopes of a hypothetical element is 65.79% at a mass of 281.95…

A: Given: The natural distribution of the isotopes of a hypothetical element is 65.79% at a mass of…

Q: Approximately how many times greater is the diameterof an atom than the diameter of its nucleus?…

A: Atoms are bigger in size and in the center of the atom nucleus is present.

Q: Antimony has many uses, for example, in infrared devicesand as part of an alloy in lead storage…

A: Isotope with mass 120.904 and 122.904 is 904 Sb51  and 122.904Sb51. The total atomic mass of Sb is…

Q: Phosphorus has the atomic number 15 and an atomicmass of 31 amu. How many protons, neutrons, and…

A: In a neutral phosphorus atom:

Q: One isotope of a nonmetallic element has mass number31 and 16 neutrons in the nucleus. The anion…

A: The chemical symbol for the anion has to be given,

Q: Complete the table below. Where isotopic notation is required, enter the complete isotopic notation,…

A: Species which contain same number of protons and electrons but different number of neutrons are…

Q: An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass…

A:

Q: Determine whether each of the following statements is trueor false. If false, correct the statement…

A: An atom is the “smallest unit in an element”, this was until the discovery of the sub-atomic…

Q: Question mentioned in attached file

A: Chemical symbol of an atom X can be represented as;  ZAX A is the mass number and Z is the atomic…

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: how do i wirte the atomic symbol for the isotope a chlorine atom with 18 neutrons

A: Nuclide /atomic symbol of an atom is shown below:

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

A: Isotopes are the atoms of “same elements which have different number of neutrons” in their nucleus.…

Q: A. What is the mass number of an atom of Iron ( atomic number 26) with 32 neutrons?  B. Is this…

A:

Q: How much (in atomic mass units, amu) would 78 atoms of an element with atomic mass 107.18 weigh?…

A:

Q: Define atomic numberand mass number.Which can varywithout changing the identity of the element?

A: Atomic number (Z) is defined as the number of protons present in the atom. Mass number is defined as…

Q: Suppose that a hypothetical element con- sists of a mixture of two isotopes. One iso- tope, having…

A:

Q: The element xenon (Xe) was the last of the noble gases discovered by Sir William Ramsay, and the…

A: Given information: Atomic volume of argon = 22.56 cm3/mol Atomic volume of krypton = 27.99 cm3/mol

Q: Calculate the atomic mass of a hypothetical element with 2 isotopes, the first with mass 34.15 amu…

A:

Q: The elements in Groups 1A(1) and 7A(17) are all quite reac-tive. What is a major difference between…

A: The elements of group 1A and group 7A are reactive elements that form many compounds.

Q: What is the atomic weight for the element that is in group 5A and period 4?

A: given: group 5A period 4

Q: n element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with mass…

A: Given that, Element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with…

Q: what is the atomic number for 37Cl with a charge -1

A: Given that, Cl-37 Charge = -1

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

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Q: Indicate the isotope having 12 protons, 11 neutrons and 12 electrons.

A: We have to predict the element symbol.

Q: On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 %% for…

A: The average atomic mass of an element can be calculated as shown below.

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

A:

Q: A naturally occurring element identified by the symbol 'X', has the following isotopic composition…

A: The question is based on concept of atomic mass calculations. we have been given percentage…

Q: Sort the characteristic properties of the following isotopes of nitrogen into their respective bins.

A:

Q: Gallium, which has an atomic mass of 69.723 amu, hastwo naturally occurring isotopes, Ga-69 and…

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

Q: b. Rutherford created the cathode-ray tube and was the lith Which of the following is(are) correct?…

A: The correct statement (s) are to be determined. (a) Ca2+2040 ion : The atomic number=20 The number…

Q: The following diagram is a representation of 20 atoms ofa fictitious element, which we will call…

A: Given data: Total number of atoms in box = 20 Number of red balls (293 NV) = 12 Number of blue balls…

Q: The natural abundance of 3He is 0.000137%. (a) How manyprotons, neutrons, and electrons are in an…

A: a. The number of protons = 2  The number of electrons = 2 and  The number of neutrons = 3-2 = 1

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

A:

Q: Which of the following elements would you expect to have similar properties? As Te Ar Sn He

A: The element present in the same group of the periodic table has the same chemical properties. The…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Given that: Isotope Mass(amu) Relative abundance 98Ru 97.9 90.3% 99Ru 98.9 9.7%

Q: Bronze medals are made from an alloy composed of 93.8% copper, 5.1% tin, and 1.1% zinc (measured by…

A: Given : Mass % of copper = 93.8 % mass % of tin = 5.1 %  and mass % of Zinc = 1.1 % Assuming 100 g…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, Ilocated in the outer Solar…

A: As it is given the mass of isotope and it's relative abundance. So we can easily calculate the…

Q: Naturally occurring tungsten metal is composed of three stable isotopes: 182 74W, with a natural…

A:

Q: (a) Define atomic number and mass number. (b) Which of these can vary without changing the identity…

A: a)Atomic number (Z) is defined as the number of protons present in the atom.Mass number is defined…

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.