Atomic Structure
Quiz by Tomekka Williams
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10 questions
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- Q1How many protons, neutrons and electrons are present in an atom of Hafnium, Hf, with a mas number of 178?178 protons, 250 neutrons, 72 electrons72 protons, 106 neutrons, 72 electrons106 protons, 72 neutrons, 106 electrons72 protons, 106 neutrons, 178 electrons30s
- Q2What is the atomic mass of Neon rounded to the nearest whole number?201020.1810.1830s
- Q3What element is represented in this Bohr Model?LithiumCarbonHydrogenAluminum30s
- Q4What subatomic particle of an atom always determines the element’s identity?NeutronsProtonsElectronsMegatrons30s
- Q5An atom of a certain element has 36 protons, 36 electrons and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom?84 neutrons48 neutrons58 neutrons36 neutrons30s
- Q6In the early 1900's Ernest Rutherford completed an experiment that changed the concept of an atom. His discovery led to the understanding that an atom is mostly made up of empty space with -electrons orbiting a dense nucleus made up of protons and neutronsprotons orbiting a dense nucleus made up of electrons and neutronselectrons and neutrons orbiting a cloud of protonsprotons and neutrons orbiting a cloud of electrons30s
- Q7A model of a beryllium atom is shown. What type of particles are in the cloud surrounding the atoms nucleus?negatively and positively charged particlespositively charged particlesnegatively charged particlespositive particles and particles with no charge30s
- Q8What is the mass number of a potassium (K) atom that has 20 neutrons?1820391930s
- Q9An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atoms nucleus?-25+25+30-3030s
- Q10Which of the following best describes an electron?It has a positive charge much more mass than a neutronIt has no charge about the same mass a protonIt has a negative charge much less than a protonIt has a negative charge and about the same mass of a neutron30s
