eQuizShow
Chemistry
Laws
Question: The law that states that mass cannot be created or destroyed in ordinary chemical and physical changes.
Answer: Law of conservation of mass
Question: The law that states that energy can not be created or destroyed
Answer: The law of conservation of energy
Question: The law that states that when two elements combine to form two or more compounds, the mass of one element that combines with a given mass of the other is in the ratio of small whole numbers
Answer: law of multiple proportions
Question: The law that states that a chemical compound always contains the same elements in exactly the same proportions by weight or mass
Answer: law of definite proportions
Question: The law that states that if you make your chemistry teacher upset, he will kick some series a%%!!!
Answer: The law of Szeliga's Classroom
Parts of an Atom
Question: The subatomic particle that has a positive charge.
Answer: Proton
Question: The part of the atom that has a negative charge.
Answer: Electron
Question: The part of the atom that is neutral.
Answer: Neutron
Question: Are located in orbitals outside the nucleus of an atom.
Answer: Electrons
Question: Are located in the nucleus of an atom?
Answer: Protons and Neutrons
Dalton's Theory
Question: The theory that all matter is composed of atoms.
Answer: The atomic theory
Question: Which statement in Dalton's atomic theory is supported by the law of conservation of mass?
Answer: The statement that atoms cannot be created or destroyed
Question: Dalton's atomic theory contains five basic principles, some of which have been modified. Which two theories have been proven incorrect.
Answer: #1. all matter is composed of extremely small particles called atoms, which cannot be subdivided, created, or destroyed.
#5. in chemical reactions, atoms are combined, separated, or rearranged but never created, destroyed, or changed.
Question: There is no difference between the gold found in an ancient Egyptian necklace or the gold found in the South American rainforest. Which of the Dalton's theory does this statement apply?
Answer: # 2. atoms of a given element are identical in their physical and chemical properties
Question: The best chemistry teacher in the School District of Philadelphia?
Answer: Mr. Szeliga
Energy
Question: The energy of an object that is due to the objects motion.
Answer: Kinetic Energy
Question: Stored energy...
Answer: Potential energy
Question: Describes a process in which a system releases heat into the environment.
Answer: Exothermic
Question: Describes a process in which heat is absorbed from the environment.
Answer: Endothermic
Question: The two temperature scales that are used in chemistry.
Answer: Celsius and Kelvin
Periodic Table
Question: Discovered the Nucleus of an Atom by using the Gold Foil Experiment.
Answer: Rutherford
Question: It tells your the number of protons in an atom.
Answer: Atomic Number
Question: The number of protons and neutrons can be found by the what?
Answer: Mass number
Question: If an atom has an atomic number 19 and a mass number of 39. How many neutrons does it have?
Answer: 20 Neutrons
Question: If an atom has a mass number of 133 and 78 neutrons, how many electrons does it have?
Answer: (78 protons) = 78 electrons