A rough estimate of the radius of a nucleus is provided by the formula r 5 kA1/3, where k is approximately 1.3 × 10-13 cm and A is the mass number of the nucleus. Estimate the density of the nucleus of 127I (which has anuclear mass of 2.1 × 10-22 g) in grams per cubic centimeter. Compare with the density of solid iodine, 4.93 g cm-3.

Q: 3. The (hypothetical) ionic compound F2INAIS2 (243.93 g/mol) dissolves in 500.0 mL of hot water to…

A:

Q: In 1982, the production of a single atom of 266/109  Mt (meitnerium-266) was reported. Describe the…

A: The given element is meitnerium (Mt). It has mass number equal to 266 and atomic number equal to…

Q: Please calculate, how many atoms exist in 1cm^3 of copper with the density 8,93 gr/cm^3 and the…

A: 1 cm3 of copper with the density 8.93 g/cm3, whose number of atoms is to be determined.

Q: Give the name and formula of the compound formed from the following elements: (a) 37Q and 35R (b) 8Q…

A: Representation of an isotope is given as: XZA where, A is the mass number, Z is the atomic number…

Q: Using a deuteron beam, a sample of isotopically enriched fluorine is generated, consisting of 18F…

A:

Q: 66. Which element do you expect to be most like magnesium? Why?(a) potassium(b) silver(c) bromine(d)…

A: Magnesium = Its atomic number is 12, and present in Group 2 in the periodic table.

Q: Calculate the precise mass of each ion to five significant figures. Unless otherwise indicated, use…

A: The compound considered is methylbromide cation, [CH3Br] +

Q: If the density of indium is 7.31 g/cm', how many atoms are there in a indium piece of 30 dm wide, 5…

A:

Q: 1.) The energy change in a chemical reaction comes from a change in mass. Calculate the mass change…

A: Step 1 Given: The ∆H°rxn is -802.35 kJ/mol. Introduction: Einstein equation gives us the…

Q: What is the radius (in cm) of a pure copper sphere that contains 1.27*1-^24 copper atoms?  The…

A:

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

A: The formula for fractional abundance is, Fractional abundance=0.01×Abundance(%)

Q: How to calculate the relative atomic mass (6.015122) of 6Li, from the atomic mass of Lithium?

A: In the given question we have to calculate the relative atomic mass of Lithium.  we know that,…

Q: B Na,S O,

A: 6) To write net ionic equation, follow the below mentioned steps: 1)Write balanced chemical…

Q: A 6.700-g hydrate of sodium sulfate, Na2SO4-nH2O loses 2.896 g of its mass upon heating. The mass…

A: In this question, we will determine the value of n ( where n is the number of water molecules )…

Q: What is the major problem with the equation Ca (s) + 2 H₂O (1) --> Ca(OH)2 (aq) + H₂ (g)? Select…

A: When calcium reacts with water, it results in the production of hydrogen gas and calcium hydroxide.…

Q: Fill in the blanks:(a) The symbol and atomic number of the heaviest nonradioac-tive noble gas are…

A: The periodic table is the representation of elements that are arranged by atomic number, electronic…

Q: Which element would be expected to have chemical and physical properties closets to those nitrogen(N…

A: sulfur, because it's in the same groupGroups are columns of a periodic table. Both oxygen and sulfur…

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: How many valence electrons does an element in each group contain: (a) 2A; (b) 4A; (c) 7A?

A: (a)  Group 2A : Valence electrons = 2 (b)  Group 4A : Valence electrons = 4 (c)  Group 7A : Valence…

Q: Не N Ne P. Na

A: Given,

Q: s 9497644 00e lt Cf 3. The actual mass of one atom of an element is 4.480 x 10-23 g. An swer parts…

A: (a) The atomic mass of the element is

Q: If the density of indium is 7.31 g/cm', how many atoms are there in a indium piece of 30 dm wide, 5…

A: Density of an element is defined as the ratio of the mass of the element to its volume.…

Q: How to calculate the relative atomic mass (6.015122) of 6Li, from the atomic mass of Lithium?

A: As we know,  Relative atomic mass = atomic mass of an atom / 1 amu

Q: A student obtained the following data in this experiment. Fill in the blanks in the data and make…

A: All the values can be calculated using the given experimental data.  Some values would require…

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: A. Write the Xnotation for each atomic depiction: (a) Z 18e 18p* 20nº (b) 25e 25p* 30n (c) 47e 47p*…

A:

Q: Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical…

A: Answer: Given two products in the reaction are Ca(ClO)2 and H2O and we have to find out the…

Q: (a) What percentage of the electrons originally in the cube was removed? % (b) By what percentage…

A:

Q: 25. The element francium forms the ion Fr* by (A) losing one proton. (C) losing one electron. (B)…

A: Francium is having electronic configuration [Rn] 7s 1 Fr --- --> Fr+ If an atom will loose or…

Q: 16) What's the atomic number of sulfur-34 ? A) 34 B) 18 C) 16 17) In the formula of hydroxylapatite…

A: According to our guidelines we can answer only three subparts

Q: An element, X, has the following isotopic composition: X-200, 90%; X-199, 8.0%; and X-202, 2.0%. Its…

A:

Q: How many protons and neutrons are present in 118Sn4+?

A:

Q: If the density of indium is 7.31 g/cm², how many atoms are there in a indium piece of 30 dm wide, 5…

A:

Q: Give the name and formula of the compound formed from thefollowing elements:(a) ₃₇Q and ₃₅R(b) ₈Q…

A: (a) The atomic number of an element is written as a subscript on left side of symbol of the element…

Q: Name each of the following oxides. Assuming that thecompounds are ionic, what charge is associated…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: The number of electrons and protons in Fe*2 are(atomic number=26)

A: Given :- Fe+2  Atomic number of Fe = 26  To find out :- number of electrons and protons.

Q: What is the differences between an Oxygen atom (16 amu, atomic number = 8) and a Calcium atom (46…

A: Oxygen atom = 16amu Calcium atom = 40amu  Metal- it have tendency to lose electron. Non metal - it…

Q: A group 8 element (MM) reacts with fluorine to give MF2. The same element reacts with oxygen to give…

A: Here it is group 8 element so it will be probably iron (Fe). Because FeF2 and Fe2O3 is probably the…

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: The most common isotope of oxygen has a mass number of 16, but two other isotopes having mass…

A: Isotopes are the compounds having same atomic number but different mass number.  They have same…

Q: An atom of 14C contains 6 O 20 8 protons.

A: we have to tell numbers of proton in carbon - 14

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.