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Chapter 2 - Chemistry
... Deductions from Dalton s Atomic Theory Explains: 1.) difference between element and compound 2.) Law of Mass Conservation - states that total mass remains constant during a chemical reaction 3.) Law of Definite Proportions - compound is type of matter containing atoms of two or more elements is defi ...
... Deductions from Dalton s Atomic Theory Explains: 1.) difference between element and compound 2.) Law of Mass Conservation - states that total mass remains constant during a chemical reaction 3.) Law of Definite Proportions - compound is type of matter containing atoms of two or more elements is defi ...
Things to Know to Pass the Chemistry Regents
... 5. Orbitals: most probable location of electrons in e- cloud, modern (wave-mechanical) model 6. Mass number: protons + neutrons, C-14 has a mass of 14 (6p + 8n = 14) 7. Atomic number: equals # of protons, identifies element/atom *all atoms with 6p are carbon, all atoms of carbon have 6p 8. Number of ...
... 5. Orbitals: most probable location of electrons in e- cloud, modern (wave-mechanical) model 6. Mass number: protons + neutrons, C-14 has a mass of 14 (6p + 8n = 14) 7. Atomic number: equals # of protons, identifies element/atom *all atoms with 6p are carbon, all atoms of carbon have 6p 8. Number of ...
nature of Matter
... H has an atomic number of 1 so, it has only 1 proton in its nucleus and consequently, 1 electron. The mass number is the total number of protons and neutrons in an atom’s nucleus. Examples: Potassium-39 (19 protons & 20 neutrons) Uranium-235 (92 protons & 143 neutrons) Nitrogen-14 (7 protons ...
... H has an atomic number of 1 so, it has only 1 proton in its nucleus and consequently, 1 electron. The mass number is the total number of protons and neutrons in an atom’s nucleus. Examples: Potassium-39 (19 protons & 20 neutrons) Uranium-235 (92 protons & 143 neutrons) Nitrogen-14 (7 protons ...
Atoms, Molecules and Ions
... element are identical, having the same size, mass and chemical properties. The atoms of one element are different from the atoms of all other elements. 2. Compounds are composed of atoms of more than one element. The relative number of atoms of each element in a given compound is always the same. 3. ...
... element are identical, having the same size, mass and chemical properties. The atoms of one element are different from the atoms of all other elements. 2. Compounds are composed of atoms of more than one element. The relative number of atoms of each element in a given compound is always the same. 3. ...
Chapter 11 Notes
... So each organism is continuously replenishing the amount of C-14 in its body. Once the organism dies, no more C-14 is consumed so the level of C-14 begins to ...
... So each organism is continuously replenishing the amount of C-14 in its body. Once the organism dies, no more C-14 is consumed so the level of C-14 begins to ...
Answers to practice questions
... _____ 18. A certain radioactive isotope has a half life of three days. If 40 g of substance is present at the beginning, how much is left nine days later? A) 40 g B) 20 g C) 5 g D) 4.4 g *Define half-life: The time needed for half of a radioactive sample to decay _____ 19. The heat of the sun is pro ...
... _____ 18. A certain radioactive isotope has a half life of three days. If 40 g of substance is present at the beginning, how much is left nine days later? A) 40 g B) 20 g C) 5 g D) 4.4 g *Define half-life: The time needed for half of a radioactive sample to decay _____ 19. The heat of the sun is pro ...
Unit 3 Study Guide: Atomic Structure and Nuclear
... 1. The difference between the mass of a nucleus and the sum of its nucleons ...
... 1. The difference between the mass of a nucleus and the sum of its nucleons ...
Chapter 2 Powerpoint
... which the substance does not change. (Phase changes, volume changes) Chemical change, chemical reaction- change in matter in which new substances are formed in the product. (Combustion) Nuclear change-nuclei of one isotope spontaneously changes or is made to change into nuclei of a different iso ...
... which the substance does not change. (Phase changes, volume changes) Chemical change, chemical reaction- change in matter in which new substances are formed in the product. (Combustion) Nuclear change-nuclei of one isotope spontaneously changes or is made to change into nuclei of a different iso ...
Atomic Energy for Military Purposes
... 1.3. These two principles have constantly guided and disciplined the development and application of science. For all practical purposes they were unaltered and separate until some five years ago. For most practical purposes they still are so, but it is now known that they are, in fact, two phases of ...
... 1.3. These two principles have constantly guided and disciplined the development and application of science. For all practical purposes they were unaltered and separate until some five years ago. For most practical purposes they still are so, but it is now known that they are, in fact, two phases of ...
Physical Science Week 1
... • Matter: Anything that takes up space and has mass. • Atom: The smallest unit of an element that maintains the properties of that element. ...
... • Matter: Anything that takes up space and has mass. • Atom: The smallest unit of an element that maintains the properties of that element. ...