C. An atom of helium has a full outer energy level and is therefore unusually reactive. Bohr model can be applied for hydrogen atom but not for large atoms. Atomic theory is the scientific theory that describes the nature of matter by means of discrete units called atoms. Edit. A. M. May 21, 2014. C. It is like a fried egg with the yolk representing the nucleus. (1) An atom is an indivisible hard sphere. Electron clouds are regions where electrons are likely to be found. The origin of this theory is from ancient Greece, which then entered the scientific mainstream. The simplest example of the Bohr Model is for the hydrogen atom (Z = 1) or for a hydrogen-like ion (Z > 1), in which a negatively charged electron orbits a small positively charged nucleus. These models are listed in the table below in order of development from top to bottom. Four statements about the development of the atomic model are shown below. More than one selection may be More than one selection may be A: The Bhor model of an atom can be described as follows: (4) Electrons in an atom have wave-like properties. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. B: hard, indivisible sphere. (2) An atom has a small, dense nucleus. Louis de Broglie proposed that all particles could be treated as matter waves with a wavelength , given by the following equation: Erwin Schrdinger proposed the quantum mechanical model of the atom, which treats electrons as matter waves. Select all that apply. 1 Which statement describes the earliest model of the atom? Which statement best describes this model? Atomic Model Worksheet 1. Which statement describes one feature of Rutherford's model of the atom? Q: Describe Niels Bohr's model of the structure of the hydrogen atom. Each scientist may be used more than once. Isotopes and Atoms. 4 Which statement describes a concept included in the wave-mechanical model of the atom? What does half life depend on and what does it not depend on? According to atomism, matter consists of discrete particles. CONTENTS. Which statement describes a concept included in the wave mechanical model of the atom? @ An atom with 9 protons in the nucleus, with 2 electrons on the first shell and 7 on the second shell. (1) Protons, neutrons, and electrons are located in the nucleus. Another way of thinking about this model was that the atom was seen to be like a mini solar system where the electrons orbit the nucleus like planets orbiting around the sun. 2 In all atoms of bismuth, the number of electrons must equal the (1) number of protons (2) number of . HChem1 DRAFT. 1 Answer. mbiddle_63627. This theory was then disproved by Ernest Rutherford and the gold foil experiment in 1911, where Rutherford shot alpha particles at gold foil . Thanks 10. The model of the atom has changed as scientists have gathered new evidence. This answer has been confirmed as correct and helpful. 5. two electrons within the same orbital my have the same . Postulate 1: An atom consists of a positively charged sphere with electrons embedded in it. heart outlined. O Most of the atom is "empty space" with an electron moving in a region outside of the nucleus. In this model, the nucleus is a dense region of the. D: Atoms are hard, indivisible spheres. They were the first to demonstrate it. All three of the other options are correct Most of the atom is "empty space with an electron moving in a region outside of the nucleus. (3) Atoms are hard, indivisible spheres. The statement that describes the earliest model of the atom is: A. (1) Protons, neutrons, and electrons are located in the nucleus. B. 60 seconds. An atom can be defined as the smallest, indivisible, basic unit of matter that forms all chemical elements.. . (1) An atom is an indivisible hard sphere. C: mostly empty space. The atom cannot be divided into smaller particles. A student compares some models of the atom. Q. 1 times. This model is sometimes known as the planetary model of the atom. 22.State one conclusion about the internal structure of the atom that resulted from the gold foil experiment. 2 See answers Advertisement atom: An atom is a particle of matter that uniquely defines achemical element. 36 As the first five elements in Group 15 are considered in order of increasing atomic number, first ionization energy (1) decreases The electrons will not . . A simplified picture of this is shown alongside. D: Atoms are hard indivisible spheres. Overview and Key Difference 2. It was the first model to introduce the concept of a quantum number to describe atomic states and to postulate quantization of electron orbits in the atom. Which statement best best describes the location of factories in new England during the early 1800s? Electrons revolve around the nucleus in a fixed circular path termed "orbits" or "shells" or "energy level.". Which order of statements represents the historical development of the atomic model? Which statement best best describes the density of an atoms nucleus. 1 Which statement describes a concept included in the wave-mechanical model of the atom? Which statement describes the earliest model of the atom? Question 13. Which of the following statements correctly describes the fluorine atom using the Rutherford-Bohr model? O It was proposed by J.J. Thomson. quarterfreelp and 13 more users found this answer helpful. the nucleus of an atom of 10. The word "atom" comes from the ancient Greek word atomos, which means indivisible. Which statement correctly describes an atom of the element helium? This model was known as the 'plum pudding' model. The orbits are termed as "stationary orbit.". In what order should Jerome put these models to show the development from the earliest model of the atom to the most recent one? 95% average accuracy. 8 answers. B: Atoms have small, negatively charged particles. A: Electrons have wavelike properties. The electrons are located within the positive material of the nucleus. Atomic theory is the scientific theory that matter is composed of particles called atoms. Every circular orbit will have a certain amount of fixed energy and these circular orbits were termed orbital shells. 1 Which statement describes a concept included in the wave-mechanical model of the atom? Applications. It is like an aquarium with swimming fish representing positive charges. Learn about the contributions made to early atomic theory by . 04B5ED0D V1 - Page 3 16) The results of the . Given a list of atomic model descriptions: A: electron shells outside a central nucleus. The electron has properties of both particles and waves. The mass of a proton is approximately equal to the mass of? (4) Electrons in an atom have wave-like properties. The ionization limit in Equation 6.47 that we obtain in Bohr's model agrees with experimental value. C: The center of an atom is a small, dense nucleus. D ) X and A. (1) 1 (3) 13 (2) 2 (4) 17: 2: group 2 are 2+ 4 Which statement describes the relative energy of the electrons in the shells of a calcium atom? Quantum model explains the wave-particle duality of an electron. D. It is like a huge stadium with a positively charged marble at the center. B. According to this idea, if one were to take a . Y, X, Z, W. . An electron in the third shell has more energy than an electron in the second shell. An atom consists of a central nucleus that is usually surrounded by one or more electrons. The discovery of atomic structure in the early 1900's was discussed in Chapter 2 of your textbook. A) An atom is an indivisible hard sphere. Save. Rutherford overturned Thomson's model in 1911 with his famous gold-foil experiment, in which he demonstrated that the atom has a tiny, massive nucleus. 1 Which statement describes the earliest model of the atom? What is Democritus Atomic Theory 3. least amount of energy to remove the most loosely held electron from a gaseous atom in the ground state? The word "atom" means "uncuttable" in Greek terms. An atom is an indivisible hard sphere. This graphic takes a look at the key models proposed for the atom, and how they changed over time. An atom of helium most similarly behaves like an atom of hydrogen since it is in the same period. One atomic model proposed during this period . Get the answers you need, now! Today, we will be learning about the evolution of the models of the atom. Electron clouds are regions where electrons are likely to be found. He was a schoolteacher who performed many experiments on atoms. Shape of Orbitals. 3. there are four different kinds of p orbitals. Chemistry questions and answers. An atom of helium has its valence electrons in it's first energy level. 2. the orientation describes the probability of finding an electron at different angles about the nucleus. Science. This resembles the sticky jam part of a pudding. THOMSON'S ATOMIC MODEL Using what he had discovered, Thomson predicted what an atom should look like. A) Electrons in an atom have wave-like properties. The first model of the atom was developed by JJ Thomson in 1904, who thought that atoms were composed purely of negatively charged electrons. 3 An atom of an element forms a 2+ ion. B) An atom has a small, dense nucleus. Correct answers: 3 question: Which statement describes one feature of Rutherford's model of the atom? 21.State one way in which the Bohr model agrees with the Thomson model. The current model of the atom in which essentially all of an Atom's mass is contained in a very small nucleus, whereas most of an atom's volume is due to the space in which the atom's electrons. The atom is now considered to be the basic unit of simple substances or elements. 27.Given the table below that shows student's examples of proposed models of the atom: Which model correctly describes the locations of protons and electrons in the wave-mechanical model of the atom? Which statement describes the earliest model of the atom? Most of the space . C) Electrons are negative particles in an atom. . 11 answers. In the Bohr Model, the electron is treated as a particle in fixed orbits around the nucleus. Only certain electron orbits are permitted. 1 Which statement describes the earliest model of the atom? Four models of the atom are shown below, but one important model is missing. C) Electrons are negative particles in an atom. (2) Neutrons are located in shells outside the . A student compares some models of the atom. ishunarwar8388 ishunarwar8388 04.07.2018 Chemistry Secondary School answered Which statements describe Rutherford's model of the atom? The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons . They are so small that accurately predicting their behavior using classical physicsas if they were tennis balls, for exampleis not possible due to quantum effects. a) Atoms cannot be created, destroyed or divided into smaller particles. Three statements that describe Rutherford's model of the atom: (1) The atom is mostly empty space. This evidence led Rutherford to suggest a new model for the atom, called the nuclear model. Select three options. 2. D) An atom is an indivisible hard sphere. Figure 6.17 The energy spectrum of the hydrogen atom. electrons, are located in regions called orbitals. In the Quantum Mechanical Model, the electron is treated mathematically as a wave.