Phosphorus-31 forms an ion expressed as 31P3-.  What is the required change in the number of subatomic particles necessary to achieve this charge?

Q: Determine the atomic mass (in g/mol) of an isotope using the following info: mass of an isotope…

A: Answer: First of all we will find out the number of moles in 2.97×1022 atoms. After that, by using…

Q: Explain how J. J. Thomson’s determination of the charge-to-mass ratio of the electron led to the…

A: Thomson Atomic model introduced us to the world of subatomic particles. He discovered the first-ever…

Q: (a) What isotope is used as the standard in establishing the atomic mass scale? (b) The atomic…

A: a)Atomic mass scale: It is relative scale used to determine the elements mass relative to…

Q: One way in which Earth’s evolution as a planet can be understood is by measuring the amounts of…

A:

Q: Describe the process of determining the number of Subatomic particles in Atoms?

A: An atom is the smallest invisible and indivisible particle of matter. However, an atom still…

Q: 1. The noble gas, neon, has three isotopes of masses, 22, 21, and 20. If the isotopes have the…

A: Average atomic mass calculation: (1) Consider the given information is as follows;…

Q: The two naturally occurring isotopes of boron, boron-10 and boron-11, have masses of10.0129370 u and…

A: Atoms that have the equal number of protons but distinct numbers of neutrons are termed as isotopes.…

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: An unknown element X has the following isotopes: 140X (89.00% abundant) and 142X(11.00% abundant).…

A: Since,         Average Atomic mass=Σass of Isotope×% of Isotope100

Q: In nature, gallium (Ga) is found as two isotopes. Calculate the atomic mass of this element. 69…

A: If an element exist in two isotopes then to calculate its atomic mass, multiply all the element…

Q: Suppose that one of Millikan’s oil drops has a charge of −4.8×10−19 C.How many excess electrons does…

A: Given,One Millikan’s oil drop has a charge = -4.8 × 10-19 CCharge of an electron = -1.6 × 10-19…

Q: Explain how isotopes are produced by changing the relative number of specific subatomic particles

A: Isotopes are atoms of same elements which have same atomic number but different mass number. In…

Q: What is identity of an ion having 32 protons, 30 electrons and 40 neutrons?

A: Given : number of protons = 32 number of electrons = 30  and number of neutrons = 40

Q: Which elements make up about 99% of the mass of living things?

A: Elements are very important for the maintenance of biological life. For example sodium and potassium…

Q: What isotope is used as the standard in establishing the atomic mass scale?  The atomic weight of…

A: The mass number given in the periodic table is the average mass of all the isotopes of an element.…

Q: An unknown element X has the following isotopes: ⁵²X (90.00% abundant), ⁴⁹X (8.00% abundant), ⁵⁰X…

A: The approximate atomic mass of element x is calculated as,

Q: Fill in the gaps in the following table: Symbol P3- Protons 35 49 Neutrons 45 66 118 Electrons 46 76…

A:

Q: An unknown element X has the following isotopes: 126X (22.00% abundant), 128X (34.00% abundant),…

A: These are three isotopes of element X are given .Calculate the average atomic mass of X in…

Q: Complete the following table. Put the full symbol, e.g. 37^Cl- symbol 605^W^8+ 37^Cl-   protons…

A: To complete the table, symbol 605W8+ 37Cl-   protons     5 neutrons     5 electrons      5…

Q: What is the symbol for the isotope of "Fe that possesses 31 neutrons? Express your answer as a…

A: To find: The symbol of the isotope of  55Fe which posses 31 neutrons.

Q: Which statement about subatomic particles are false? Protons and neutrons have charges of the same…

A: Proton, neutron and electrons are the subatomic particles present in an atom.

Q: There are three stable isotopes of silicon: 28Si, 29Si, and 30Si. Their masses and natural…

A: We have three isotopes of Si  having abundance and mass, we have to calculate the weighted average.…

Q: Copper has 2 stable isotopes, namely Cu-63 and Cu-65. The atomic masses of the said isotopes are…

A:

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

A:

Q: - Argon has three naturally occurring isotopes: 0.337% 36Ar, 0.063% 38Ar, and 99.60% 4ºAr. Estimate…

A: Given : There are 3 naturally occurring isotopes of Argon i.e Ar.

Q: Please answer question a & b both.

A: Average atomic mass can be determined by the equation given below:

Q: Calculate the mass, in kg, of sample.  7.55x10^26 cadmium atoms

A:

Q: An unknown element X has the following isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant). What…

A: Average atomic mass can be determined by the equation given below:

Q: If a sample of a difference compound decomposes into 0.429g of carbon and 0.57g of oxygen,what is…

A: The mass of carbon and oxygen are given as 0.429 g and 0.57 g. The ratio of mass of Oxygen and…

Q: Rubidium has two naturally occurring isotopes, rubidium-85 (atomic mass = 84.9118 amu; abundance =…

A: Given information:Isotopes of rubidium are Rb-85 and Rb-87.Atomic mass of Rb-85 is 84.9118 amu and…

Q: Question attached

A: Atomic mass: It defined as the mass of the atom that is present in an element expressed in terms of…

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

A:

Q: Element R has three isotopes. The isotopes are present in 0.0825, 0.2671, and 0.6504 relative…

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

Q: B) The average atomic mass of chlorine is 35.453. Does this mean that there are just two stable…

A: In order to explain the answer for the above question we have to first understand the given question…

Q: On the fictional planet Zeus, boron occurs as 55.46% of 10B (atomic mass = 10.01 u) and 44.54% of…

A:

Q: What are the names of the three subatomic particles? What are their approximate masses in atomic…

A: Subatomic particles are the parts of an atom. They constitute the atom. They play an important role…

Q: When carbon and oxygen react, two different compounds can form dependingon the conditions. Compound…

A: The law of multiple proportions is the third postulate of Dalton's atomic theory. Law of multiple…

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: mass

A: This question is related to atomic mass.

Q: One of the heaviest atoms found in nature is 238U. Its relativeatomic mass is 238.0508 on a scale in…

A: Given, 238U relative atomic mass is 238.0508

Q: What are the symbol and name for an element whose average atoms have a mass that is 38.8% of the…

A: mass of an average Chromium atom =51.9961 u Now we have to calculate 38.8% of the mass of an average…

Q: An unknown element X has the following isotopes: $2X (84.50% abundant), 49X (8.00% abundant), 5°X…

A: Given element has three isotopes Isotope - 1 : 52X Mass number (A1) = 52 Percentage abundance (X1) =…

Q: Chlorine has two naturally occurring isotopes, ³⁵Cl (isotopicmass 34.9689 amu) and ³⁷Cl (isotopic…

A: Percent abundance tells about the abundance of each isotope in the atmosphere.

Q: How many electrons are necessary to produce a charge of -1.0 C? What is the mass of this many…

A: SOLUTION: Step 1: An electron has a charge of -1.6 ×10-19 C. The no of electrons necessary to…

Q: The mole is defined as the amount of a substance containing the same number of particles as exactly…

A: An isotope is the chemical element that has same number of protons in the nucleus having same atomic…

Q: An unknown element X has the following isotopes: ⁵⁸X (68.00% abundant), ⁶⁰X (26.00% abundant), ⁶²X…

A:

Q: Boron has two naturally occurring isotopes, boron-10 with a mass of 10.0129 amu and boron-11 with a…

A:

Q: An unknown element X has the following isotope: 25X (80.5% abundant) and 27X (19.5% abundant). What…

A: Given : Isotope 1 : X25            Atomic Mass = 25           % Abundance = 80.5 %…

Q: You have an unknown element consisting of two isotopes, one with mass 36.9659 amu (24.22%), and one…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: Antimony has 2 stable isotopes 121-Sb mass 120.9038 and 123-Sb mass 122.9042 amu. Calculate the…

A: The Atomic mass of Antimony is 121.76 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.