Consider the three stable isotopes of Oxygen with their respective atomic masses:         O =  16 ( 15.9949 amu) O =  17  (16.9993 amu) O =  18   (17.9992 amu)             Which is the most abundant?

Q: An unknown element is a mixture of isotopes ¹²⁹X and ¹³²X. The average atomic mass of X is 130.79…

A: The isotope of the unknown element is given as 129X and 132X.  The average atomic mass of X is given…

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: Almost all boron atoms are found in two forms: boron-10 and boron-11. Both isotopes behave alike…

A: Given, Boron atoms are found in two forms: boron-10 and boron-11 Average mass of B = 10.81 amu

Q: There are two naturally occurring isotopes of rubidium. What is the abundance of each isotope?…

A: The abundance of each isotope is to be calculated.

Q: How much does 4.28 x 10 21 atoms of Nickel weigh?

A: We know that, one mole of any substance contains 6.022 × 1023 atoms. We can determine the weight by…

Q: If an element, El, has two isotopes with the masses and abundances listed below: 72El: 72.1961 amu;…

A: The element that possesses distinct number for neutrons (might be less or more) as compared to its…

Q: 7. An element exists as 3 stable isotopes in nature. The isotopic masses (in amu) and percent…

A:

Q: An element has four naturally occurring isotopes. The mass and fractional abundance of each isotope…

A:

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: How many grams does 1.44 x 1028 carbon atoms weigh?

A: To calculate the mass in grams for the atoms  First we have to convert the number of Atoms into…

Q: Thallium (Tl) has two naturally occurring isotopes: Tl-203 (29.52 % ; mass = 202.972 amu ), and…

A: Average Atomic Mass of an atom can be calculated by using following formula -   Average atomic mass=…

Q: Cesium has 39 known isotopes ranging from mass 112 to 151. If a sample of cesium containing only…

A:

Q: Cesium has 39 known isotopes ranging from mass 112 to 151. If a sample of cesium containing only…

A: The average atomic mass of any particular element which exists in two or more isotopic forms, can be…

Q: An unknown element X has the following isotopes: 52X (88.00% abundant), 4⁹X (8.00% abundant), 5⁰X…

A: The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by…

Q: Titanium has five common isotopes: 46 Ti (8.0%), 47 Ti (7.8%), 48Ti (73.4%),49Ti (5.5%), 50Ti…

A:

Q: Magnesium exists in nature as three stable isotopes. Suppose you determine that 9.87 moles of…

A: Given - Exact masses of isotopes of Mg 25Mg = 24.9858 amu 24Mg= 23.9850 amu. 26Mg = 25.9826 amu. To…

Q: An unknown element X has the following isotopes: 1ºX (20.00% abundant, atomic mass = atomic mass =…

A:

Q: Thillium has two stable isotopes, T1 203 and T2 205.Knowing that the atomic weight of thillium is…

A:

Q: A sample of magnisium contains three isotopes and its atomic weight is 24.35 amu. If the sample is…

A: A element has several isotopes in nature and its occurrence by percentage is called abundance.…

Q: Copper has two naturally occurring isotopes, 63 Cu(62.9396amu)and 65 Cu(64.9278amu). If copper has…

A: %abundance of cu63= |63.546-64.9278|÷|64.9278-62.9396| So solve it  and  27% Cu63 Same for CU65= 73%…

Q: Argon has the following isotopic abundances: 35.967546 amu 0.3365% 37.962732 amu 0.0632% 39.962383…

A: Given,

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

A:

Q: The compound, X,03, contains element .5 X and oxygen atom combined in a ratio of 2.17 grams of X to…

A: The mass ratio of atom X to oxygen in X2O3 is = 2.17: 1 In the second compound, the mass ratio of…

Q: A mystery element has two main isotopes of 62.9300amu and 64.928amu. Their percent abundances are…

A: The isotopes are the elements having same atomic number but different mass number.

Q: Boron (B;Z=5) has two naturally occurring isotopes. Find the percent abundances of ¹²B and ¹¹B given…

A: The given data contains, B = 10.0129 amu. 11B = 11.0093 amu.

Q: An unknown element is a mixture of isotopes ¹²⁰X and ¹²²X. The average atomic mass of X is 121.47…

A: For an element that exists as a number of isotopes, its atomic mass is calculated by taking an…

Q: Natural gallium, which has an atomic weight of 69.7230 amu, consists of gallium-69 and gallium-71…

A:

Q: Which of the following isotopes has the highest number of neutrons? 15 7F 17 8.

A: The given options are,

Q: An element has three isotopes, A, B, and C. Percent abundance of the isotopes A and C are 60 % and…

A: The percent natural abundance of isotope A is 60%. The percent natural abundance of isotope C is…

Q: There are only two naturally occurring isotopes of Copper, 63 Cu and 65 Cu. Copper has an atomic…

A:

Q: Iron exists in nature as a mixture of predominantly three isotopes: 54 Fe (53.94 amu), 56 Fe (55.93…

A:

Q: Copper has two naturally occurring isotopes with atomic masses of 62.9296 u (C u) and 64.9278 u…

A: When two atoms have same atomic number and different atomic mass, such atoms are called isotopes.…

Q: A hypothetical element exists as two isotopes: I = 92.00 amu and II = 98.00 amu. If the atomic mass…

A: Suppose fraction of isotope I = A Fraction of isotope II = (1 - A) Atomic mass = A x atomic mass of…

Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope 46 Ti 48 Ti…

A:

Q: Mg (24.305 amu) consists of three isotopes with the masses 23.9850 amu ,24.9858 amu, and 25.9826.The…

A: We have to predict the percentage abundance of first isotope.

Q: Element X has a molar mass of 4.91 g and element Z has a molar mass of 8.09 g. What is the mass of…

A: Step 1: Find the mass of 5.95 moles of the compound X9Z1 : Element X has a molar mass of 4.91…

Q: Determine the mass of Strontium-86 (in u) given that the average atomic mass of Sr is 87.6126 u and…

A:

Q: Naturally occurring chlorine is composed of two stable isotopes namely Cl 35 (75.76 %) and Cl 37…

A:

Q: There are two naturally occurring isotopes of europium, 151Eu(151.0 amu) and 153Eu(153.0 amu). If…

A: Given information:Two isotopes of europium, 151Eu (151.0 amu) and 153Eu (153.0 amu)Atomic mass of Eu…

Q: How many neutrons are in 37.0 ug ( ug= 10^-6 g) of 14 6 C?

A: Given :- mass of 6C14 is 37.0ug  1ug = 10-6 g  To be calculated :-  Total number of neutrons

Q: b) The mass of 205TI is about 204.9744 amu. Why then does the periodic chart have an atomic weight…

A: It is given that mass of 205 Tl = 204.9744 amu.  But this do not match with molar mass of Tl which…

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46TI…

A:

Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.