How many unpaired electrons are present in the isolated carbon atom ( atomic number = 6)' A. none B. one C. two D. three E. four

Q: 2. Consider radium, which has a half-life of 1620 years. How many atoms of radium will decay in 5 s…

A: We have a Radium sample of mass m=15 g=0.015 kg which has a molar mass of M=226 kg and half life of…

Q: 6. Who discovered the nucleus of the atom? A. Dalton B. Rutherford C. Millikan D. Thomson

A: Given :- Discovery of nucleus .

Q: Question 6 Groups on the Periodic Table contain elements with similar chemical properties because –…

A: Answer :-- They have same number of valence electrons. Because :- The Vertical column on the…

Q: (application) You're comparing three different atoms. Atom A has 9 protons in the nucleus, Atom B…

A: Atom A has 9 protons in the nucleus Atom B has 10 protons in the nucleus  Atom C has 11 protons in…

Q: Physics Need Help with this I have seen an answer relating to this question but the person only…

A:

Q: 5. Which diode model represents the most accurate approximation?

A: SOlution: which diode model represent the accurate approximation.

Q: 3.An isotope of Cesium-Un has a half- life of 30 years. If 100 g. of Cesium-Un disintegrates over a…

A: Given: The half-life of the Cesium-Un is 30 years. The weight of the Cesium-Un is 100 g. The total…

Q: Define atomic number.

A: The atomic number of an element in periodic table  is the number of protons in the nucleus of an…

Q: 1. How do you describe an atom in terms of composition?

A:

Q: Explain a couple of differences between the model of an atom with the nucleus sitting in the center…

A: Atom consists of nucleus sorrounded  with electron's

Q: Both statements are true.  Both statements are false.  First statement is true and second is false…

A: Answer:- Both statements are true.    Statements 1. To maintain electric neutrality, an atom must…

Q: 3. The discovery of the neutron helped people understand A. how two atoms of the same element can…

A:

Q: 20 What is the force of repulsion between two argon nuclei that are separated by 1.0 nm (10 m on an…

A:

Q: 2. What is fission?      a. What is it used for?      b. What is the beginning atoms?      c.…

A: Fission occurs when a neutron slams into a larger atom, forcing it to excite and spilt into two…

Q: 2. (Principle) What does the H-value mean? How is it related to energy balance?

A: The H-Value means enthalpy value in thermodynamics.The Enthalpy value in thermodynamics is the sum…

Q: Carbon is the sixth element in the periodic table. How many protons and how many neutrons are there…

A: carbon - 14

Q: 8. Drag the correct number of electrons to the atom model to represent a neutral atom. 15.999 Охудеn…

A: First energy level- 2 electrons Second energy level- 6 electrons. Total = 8electrons (atomic…

Q: 4. Find the atomic spacing in a crystal of rock salt (NaCl), whose cubic structure. The density of…

A: Density (ρ) = 2.16 x 103 kg /m3Avagadro number = 6.022 c 1023 /moltotal mass of NaClM =  Na++ Cl-…

Q: O Question 6 Fluorine (F) is a nonmetal. It has a strong tendency to complete its outermost shell of…

A: A.) It will gain one electron and form F-

Q: 5. What are the weights of (a) 1 curie and 1 rd of Ra? (b) 1 curie and 1 rd of Rn? (c) 1 microcurie…

A: We are allowed to give the explanation of first three subparts of a question only which is given…

Q: Jesus sketched models of two different netural isotopes of sodium. If the isotope models are…

A: Introduction: Electrons are the elementary particles of the matter. Electrons cannot be divided…

Q: What is the approximate mass of an oxygen molecule, O2, if the atomic mass of oxygen is 15.9994 u?

A: Let M denotes the approximate mass of an oxygen molecule, and Z denotes the atomic mass. Therefore,…

Q: Question 15 The half-life of Unobtanium-118 is 3 days. How many days pass for 800 grams of this…

A:

Q: This is NOT graded.

A:

Q: 3. Which atomic property is important in understanding charging by friction? * A. atomic mass B.…

A: Atomic property is important in understanding charging by friction is

Q: 14. How many protons, neutrons and electrons are in the neutral atom of 35,„CI? A. 17 protons, 15…

A:

Q: 7. The half life of Thorium is 75,000 years. How much of a 635 gram sample will be left after…

A: Half life of Thorium is , T1/2 = 75000 years  Initial Quantity , N0 = 635 gram Time elapsed , T =…

Q: 1. Consider cobalt-60 (60Co) with a half-life of 5.25 years. How many years will it take for its…

A: Given, Half life of Co-60 is 5.25years

Q: The temperature near the surface of the earth is 291 K. A xenon atom (atomic mass = 131.29 u) has a…

A:

Q: 6. Find at least 5 elements whose symbols do not match their names 7. What are the two letters not…

A: Elements A substance that cannot be broken down into simpler substances by chemical means. An…

Q: 5) Calculate the average binding energy per mole of a U-235 isotope. Show your answer in kJ/mole.…

A: Given data is U-235 isotop.  So that we know thatuu U-235 has 92 protons and 143 neutrons and has…

Q: 4. A neutral atom always has A) More neutrons than protons. B) More protons than electrons. C) The…

A: Neutral atoms are the atoms which have no charge neither negative nor positive.

Q: ergy do you need to c

A: The energy needed to remove a proton from the nucleus E = mC2here m is the mass of the…

Q: 1. Match the parts of an atom in the left column with all the phrases in the right column that…

A: from the basic atomic structure we know that electrons , protons and neutrons made up an atom…

Q: Determine the number of protons, neutron, and electrons in each of the following species  35-Cl17

A: Given : Species 35-Cl17 Here, Mass number = 35  Atomic number = 17

Q: 19) What is the amount of starting material when 0.35-g remain and the number of half-lives is 2.72…

A: Let N be defined as the amount remaining. Therefore, N=12nN0N0=2nN Here, N0 is the initial amount of…

Q: carbon target R D/2 L-R L a) Use geometry of the given figure above to show, D R sin(- 2R = arctan

A: We need to derive a relation using geometry and calculate theta in terms of D.

Q: An oxygen-16 ion that has gained two valence electrons (anion net charge -2) and has a mass of…

A: Force acting on charged particle q moving with velocity v in a magnetic field B is given by,…

Q: An atom of carbon-14 isotope has more protons than an atom of carbon-12 isotope. True False

A:

Q: Lithium has only two naturally occuring isotopes: lithiumi-6 and lithium-7.  Lithium-6 has a mass of…

A: Since you have asked multiple questions, we will answer the first question for you. For specific…

Q: What's More Dr. Rivera, an atomic physicist, did various experiments using a particle accelerator…

A: In this question we have to answer related to particle acceleration experiment. Please give positive…

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: