6. Find at least 5 elements whose symbols do not match their names 7. What are the two letters not appearing on the periodic table as a symbol or part of the symbol?

Q: The atomic number of an atom is equal to:    A. The number of protons in an atom   B. The number of…

A: The atomic number of an atom is defined as the number of protons present in the nucleus and the…

Q: Which of the following is not true of Bohr’s atomic model? a. The Coulomb force between the nucleus…

A: Postulates of Bohr's atomic model: Coulomb's force between electron and nucleus maintains the…

Q: An atom consists of 8 protons, 9 newtons and 8 electrons. What is it's atomic number? Select one:…

A: Given Number of Protons (np) = 8  Number of neutrons (nn)= 9  Number of electrons (ne )= 8  Atomic…

Q: 1. Why can’t visible light be used to view atomic nuclei?

A: Because an atom is so much smaller than the wavelength of visible light, it can't affect the way…

Q: ypas of atoms are there? That is, approximately how many elements do we know about? Oa An infinite…

A:

Q: 2. What do you think is the speed of the electron revolving around the nucleus of the hydrogen in…

A:

Q: e). The Auger electron emission is favored only in low Z elements Explain the reason

A: Auger electron emission is the process of emission of electrons from an atom, due to the knocking…

Q: Explain how unstable heavy nuclides (atomic number > 83) may decompose to form nuclides of greater…

A: Given Explain how unstable heavy nuclides (atomic number > 83) may decompose to form nuclides of…

Q: The half-life of element X is 8 days. If 120 g of element X is placed on a table, how much remains…

A: Given data: Half life (t1/2) = 8 days Initial amount of substance (N0) = 120 g Time (t) = 24…

Q: How can you "charge" an object? Hint: This is a physics question. A. By adding or removing protons…

A: Required  method to charge a body

Q: 1. Describe briefly the two conflicting theories of the structure of the atom. d's old ord

A: The objective of the question is to provide a brief description of the two conflicting theories of…

Q: 6. The particles in the nucleus that have a positive charge are the b. neutrons a. electrons c.…

A: Part (6):Introduction: There are three fundamentals particles are present in the atom electrons,…

Q: A heavy hydrogen nucleus with one proton and one neutron is called   a. bi-hydrogen.   b. tritium.…

A: With one proton and one neutron in nucleus we get isotope of hydrogen which is called

Q: A uranium nucleus emits an α particle. Assuming charge is conserved, the resulting nucleus must be…

A: When Uranium whose mass number is 238 breaks into smaller nucleus and emitting alpha particle .

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

A:

Q: After a hydrogen atom absorbs a visible photon which of these may occur?   a. electrons jump up…

A:

Q: 13. Imaginary element Q has an atomic number of 129 and an atomic mass of 345. Complete the nuclear…

A: General equation for alpha decay: XZA →Y  z-2A-4 + H24e where,  A is mass number. Z is atomic…

Q: FORMATION OF ELEMENTS: You are going to complete the following nuclear reactions and identify the…

A: We have to complete the nuclear reaction and write its cosmic phase Nuclear reaction Cosmic Phase…

Q: 4.If someone wanted to build a scale model of the atom with a nucleus 1 m in diameter, how far away…

A: Given: Diameter = 1m or radius rn = 0.5 m To determine: How far away would the nearest electron need…

Q: The energy loss by a charged particle interacting with matter is described by: a. Linear energy…

A: Linear energy transfer describes the energy loss by charge particle interaction with matter.so the…

Q: Which one of the following diagnostic imaging technique produce images using magnetic field and…

A: Clinical resonance imaging (MRI) measures the spacial distribution of protons within the…

Q: Element Photon Isotopes Nuclear fission a. Atoms with same atomic number but different mass numbers…

A: Solution:-

Q: To date the age of the oldest materi als, scientists would normally tum to the radioactivity of a.…

A:

Q: 17. The atomic energy level diagram accounts for A. the emission spectra of an atom B. the…

A: Energy level diagram

Q: 2. Write the nuclide notation for atoms with the following characteristics: a. 25 protons, 20…

A:

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: For which one of the following, Bohr model is not valid?

A: Bohr model is applicable for only single electron species.

Q: a) The diagram below shows a plan view of the apparatus used by Rutherford and his team which led…

A: Alpha source in lead collimator, Travelling microscope with phosphorescent screen Gold foil

Q: Atom A has a larger atomic mass than atom B. Does this mean that atom A also has a larger atomic…

A:

Q: Which of the the following elements are isotopes? a) 12C, 13C, and 14C (b) 40Ar, 40K, and 40Ca (c)…

A: Definition of Isotope: Two or more forms of the same element that have the same atomic number but a…

Q: Consider bromine, which occurs as a mixture of two isotopes: bromine-79, with a natural of 50.7% and…

A:

Q: Which one of the following diagnostic imaging technique produce images using magnetic field and…

A: Magnetic Resonance Imaging (MRI) is one way for healthcare professionals to look inside human body…

Q: .Match each type of radiation with its properties. 1.can penetrate paper but not a sheet of metal…

A: Alpha particle can be blocked by the sheet of paper. Alpha particles are not enough strong to…

Q: which of the following best describes the nucleus? a. dense, positively charge b. tiny, negatively…

A: Given  Nucleus is described by

Q: the first atoms of the element Bohrium-262, 107 262BH, were made from the ismuth-209 atoms by…

A: Bohrium- 262 is a synthetic transition metal , which was being manufactured for the first time in…

Q: If an atom gives off an alpha particle what happens to the mass number of the atom? A. Decreases by…

A:

Q: True or False higher energy levels are stable. A.True B.False

A: Question. Higher energy levels are stable

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: