How many electrons are in a strontium atom (sr)? Does an atom of Sr gain or lose electrons when forming an ion? How many electrons are gained or lost by the atom? When Sr forms an ion, the ion has the same number of electrons as which one of the noble gases?

Q: A hydrate is a compound with water molecules incorporated into its crystal structure. In an…

A: The question is based on the concept of analytical chemistry.We need to calculate percentage of…

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: On another planet, the isotopes of titanium have the given natural abundances. Abundance Mass (u)…

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Q: Chemical analyses conducted by the first Mars Rover robotic vehicle in its 1997 mission collected…

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Q: The illustration on the left represents a mixture of nitrogen molecules (N2, blue) and hydrogen…

A: Dalton's theory as applied to law of conservation of mass states that mass/atoms can neither be…

Q: Complete the table. Element Mass Moles Number of Atoms Na 38.5 mg C 1.12 V 214 Hg 1.44 kg

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: A 10.5710.57 g sample of NaBr contains 22.3422.34% Na by mass. Considering the law of constant…

A: According to law of constant composition, the mass percent of any element in any compound always…

Q: During nuclear decay a 238 U atom can break apart into a helium 4 atom and one other atom. Assuming…

A: In the problem statement it is given that 238U undergoes nuclear decay to give a helium-4 atom and…

Q: Silicon has three naturally occurring isotopes (Si-28, Si-29, and Si-30). Masses and natural…

A: From the values given in the table we will first calculate the abundance if Si-30 as shown in the…

Q: Variations in average atomic mass may be observed for elements obtained from different sources.…

A: Given information: Assuming Mass of boron sourced from turkey = 10.0129 amu Mass of boron obtained…

Q: Calcium phosphide consists of two ions chemically bonded together. What are the charges of each ion?…

A: To write the chemical formula of compoundwhich follow the following rule:-(i) write the symbols of…

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

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Q: Determine the chemical formula for the ionic compound that forms between cesium and bromine.…

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Q: Suppose the diameter of a type of atom is 2.22 x 10-7 mm. A coin has diameter 1.20 cm. Suppose the…

A: If we divide the diameter of a coin by the diameter of an atom we will get the no. of atoms.  Given…

Q: 1. Lithium occurs in nature as a mixture of two isotopes: Li, which has an atomic mass of 6.015 amu,…

A: Given;

Q: Consider a sample of carbon tetrafluoride that contains 2.35 × 10²⁴ atoms of fluorine. What is the…

A: Carbon tetrafluoride is also called  Tetrafluoromethane and it is covalent compound  in which carbon…

Q: a. Using the average atomic mass of carbon, calculate the mass (in amu) of 137 carbon atoms. amu b.…

A: Answering only the first 3 subparts as per guidelines for further assistance please post the…

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

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Q: Give the systematic names for the compounds. Spelling counts. NO₂: N₂O: Nitrogen Dioxide Nitrous…

A: There are some rules to name the compound . Name the metal first and name the non metal next .…

Q: 3. A. B. C. A chlorine atom has 18 neutrons and an atomic mass of 35. How many protons are in the…

A: In an atom three fundamental particles are present. Positively charged particle proton and neutral…

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

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Q: How many protons are in an ion with 1010 electrons and a −1 charge? number of protons:     How many…

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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: a. For the negative ion Br, use the concept that a chemical compound must have a net charge of zero…

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Q: Which of the following statements is FALSE according to Dalton's Atomic Theory? Atoms combine in…

A: Dalton's atomic theory:  1. Matter consists of indivisible atoms that is atoms can not be further…

Q: For each of the following ions, indicate the total number of protons and electrons in the ion. For…

A: Chemical symbol of iron is Fe Atomic number of Fe(iron) is 26

Q: Imagine that you have discovered several stable isotopes of a new element, which you call element X.…

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Q: a. For the positive ion Rb+, use the concept that a chemical compound must have a net charge of zero…

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Q: a. For the positive ion Rb+, use the concept that a chemical compound must have a net charge of zero…

A: we have to determine the formula of the ionic compounds formed when the given ions react

Q: A 12.0912.09 g sample of NaBr contains 22.3422.34 % Na by mass. Considering the law of constant…

A: According to the law of constant composition, the ratio of the mass of elements in a compound…

Q: a certain compound is made up of 2 chlorine atoms, one carbon atom, and one oxygen atom. What is the…

A: A chemical formula is defined as the composition of elements present in the compound in a fixed…

Q: In one of your experiments, you made magnesium oxide by burning magnesium in the air. How much Mg is…

A: Magnesium reacts with oxygen to make a compound called magnesium oxide. The bright light results…

Q: Arsenic is a toxic solid often used in the past as a component of pesticides. How many electrons are…

A: Atoms can be of three types- Neutral, positively charged and negatively charged. Neutral atom is…

Q: In many compounds, carbon and oxygen form a double bond (noted by two parallel lines between the…

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Q: What is the chemical formula of carbon tetrafluoride?

A: The compound given is carbon tetrafluoride.

Q: A certain element XX has four isotopes. 5.845% of XX has a mass of 53.93961amuamu.…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: Tin has 10 stable isotopes. The heaviest, ¹24Sn, makes up 5.80% of naturally occurring tin atoms.…

A: We have to calculate atoms of 124Sn  and total mass of atoms of  124Sn

Q: The element chlorine has two naturally occurring isotopes. The isotopic masses and abundances of…

A: Recall the following expression to calculate average atomic mass of chlorine average atomic…

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

A: Given :  Isotope Abundance Mass (u) 46Ti 78.900 % 45.95263 48Ti 13.800 % 47.94795 50Ti…

Q: A compound is 32.88% C, 4.14% H, 19.18% N and 43.80% O by mass, and it has a molar mass of 219…

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Q: Write the symbols and charges of the monatomic ions formed by calcium AND phosphorus, and write the…

A: Calcium gives divalent ions (Ca2+) Phosphorous  forms the ions P3-, P4-, P3+, P5+

Q: Ions that form from one atom on the Periodic Table are call monatomic ions. However not all ionic…

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Q: Stuff happens in chemistry. Bonds between atoms break and new bonds form. Which subatomic particles…

A: Answer:Chemical reaction is a process in which breaking of old bonds and formation of new bonds…

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

A: Given: The natural abundance and atomic masses of the three isotopes of titanium: We have to…

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.