Sample Exam 1
... Part Three: Calculations – show all work. 14. Perform the following calculations to the correct number of significant figures. a) 83.5 + 7.212 + 1.2 + 400.34 b) 82.1 x 103 ÷ 75.829 + 218.39 c) 3.11 ÷ 7.65 d) 3.2 x 0.02040 x 0.599 15. Ethylene glycol (antifreeze) has a density of 1.11g/cm3. a) What ...
... Part Three: Calculations – show all work. 14. Perform the following calculations to the correct number of significant figures. a) 83.5 + 7.212 + 1.2 + 400.34 b) 82.1 x 103 ÷ 75.829 + 218.39 c) 3.11 ÷ 7.65 d) 3.2 x 0.02040 x 0.599 15. Ethylene glycol (antifreeze) has a density of 1.11g/cm3. a) What ...
Atomic Theory Powerpoint
... Thomson (English 1897) did more experiments to actually make the discovery he found ratio of charge of this particle to this mass of the particle since the ratio stayed constant for any metal that contained it, it must be the same in all of the metals ...
... Thomson (English 1897) did more experiments to actually make the discovery he found ratio of charge of this particle to this mass of the particle since the ratio stayed constant for any metal that contained it, it must be the same in all of the metals ...
No Slide Title
... • This term describes a metal that can be pounded or rolled into shape. • What is malleable. ...
... • This term describes a metal that can be pounded or rolled into shape. • What is malleable. ...
Elements, Compounds, Mixtures
... 1862, Alexandre-Emile de Chancourtois, the first notion of periodicity by increasing atomic weight, “screw” periodic table 1864, Julius Lothar Meyer, table based on valency 1863-1866, John Newlands, Law of Octaves ...
... 1862, Alexandre-Emile de Chancourtois, the first notion of periodicity by increasing atomic weight, “screw” periodic table 1864, Julius Lothar Meyer, table based on valency 1863-1866, John Newlands, Law of Octaves ...
Basic Atomic Structure and Chemical Bonding Goals: Understand
... While larger elements will have greater numbers of electrons, there are only a few that we actually care about. The electrons on the very outside of the atom are the ones that we will focus on. They are the ones involved with chemical bonding, and therefore the most important. The number of valence ...
... While larger elements will have greater numbers of electrons, there are only a few that we actually care about. The electrons on the very outside of the atom are the ones that we will focus on. They are the ones involved with chemical bonding, and therefore the most important. The number of valence ...
2 Atomic Theory Development of Theory • Historical Atomic Models
... the apparent charge of an atom in the molecule. Some oxidation numbers can often be found from the atom’s location on the periodic table, Group 1 is +1, Group 2 is +2, H is +1 (or -1 in hydrides), O is -2 (-1 is peroxides), in binary ionic compounds the halogens are -1. Otherwise the oxidation numbe ...
... the apparent charge of an atom in the molecule. Some oxidation numbers can often be found from the atom’s location on the periodic table, Group 1 is +1, Group 2 is +2, H is +1 (or -1 in hydrides), O is -2 (-1 is peroxides), in binary ionic compounds the halogens are -1. Otherwise the oxidation numbe ...
Extension 18.2: Isotopes
... Take, for example, hydrogen. It may have a single proton as its nucleus, or a proton and a neutron, or a proton and two neutrons. There are therefore three isotopes of hydrogen: they are named hydrogen, deuterium, and tritium. We denote them: ...
... Take, for example, hydrogen. It may have a single proton as its nucleus, or a proton and a neutron, or a proton and two neutrons. There are therefore three isotopes of hydrogen: they are named hydrogen, deuterium, and tritium. We denote them: ...
Development of the Atomic Theory
... Ernest Rutherford • Rutherford discovered that atoms contain a ...
... Ernest Rutherford • Rutherford discovered that atoms contain a ...
Key
... b) Write the noble gas configuration for nickel, (Ni)? c) The element with an electron configuration of 1s22s22p63s23p64s13d5 d) Te, [Kr]5s24d105p4, has how many valence electrons? e) The Lewis diagram represents the valence configuration of a main-group element in ...
... b) Write the noble gas configuration for nickel, (Ni)? c) The element with an electron configuration of 1s22s22p63s23p64s13d5 d) Te, [Kr]5s24d105p4, has how many valence electrons? e) The Lewis diagram represents the valence configuration of a main-group element in ...
Atomic History WebQuest
... •Bohr used and modified Rutherford’s model of the atom. Bohr originated the idea that electrons travel in a definite energy level around the nucleus with no loss of energy from their motion. He applied Planck’s idea of small packets or quanta of energy to his electron model. •Electrons in energy lev ...
... •Bohr used and modified Rutherford’s model of the atom. Bohr originated the idea that electrons travel in a definite energy level around the nucleus with no loss of energy from their motion. He applied Planck’s idea of small packets or quanta of energy to his electron model. •Electrons in energy lev ...
Distinguishing Between Atoms
... any one element are different from those of any other element. • Atoms of different elements can physically mix together or chemically combine with one another in simple whole number ratios to form compounds.(law of definite composition) • Chemical rxns occur when atoms are separated, joined, or rea ...
... any one element are different from those of any other element. • Atoms of different elements can physically mix together or chemically combine with one another in simple whole number ratios to form compounds.(law of definite composition) • Chemical rxns occur when atoms are separated, joined, or rea ...
Democritus - Fort Bend ISD
... Particles can’t be divided into smaller particles. Atoms of each element are exactly alike. Atoms of different elements are different masses. Atoms of different elements join to form different ...
... Particles can’t be divided into smaller particles. Atoms of each element are exactly alike. Atoms of different elements are different masses. Atoms of different elements join to form different ...
Dec. 15 , 2012, 9:00 am – noon - Dr. K. Brown
... E) No way of knowing with information given 17) A 1.00 L flask is filled with 0.160 g of unknown gas at 743 mmHg and 25 0C. Calculate the molar mass and identify the gas. The unknown gas is: A) CO2 B) O2 C) Ne D) He E) can be any of the above 18) Oxygen gas, generated by the reaction 2 KClO3 (s) → 2 ...
... E) No way of knowing with information given 17) A 1.00 L flask is filled with 0.160 g of unknown gas at 743 mmHg and 25 0C. Calculate the molar mass and identify the gas. The unknown gas is: A) CO2 B) O2 C) Ne D) He E) can be any of the above 18) Oxygen gas, generated by the reaction 2 KClO3 (s) → 2 ...
Nuclear Reactions Created by Patrick Haney The atoms of each
... Mass numbers do NOT tell us the number of neutrons in an isotope. To find the number of neutrons in an isotope, you must take the mass number and subtract the atomic number # of neutrons = mass number – atomic number How many neutrons are in the nucleus of a ...
... Mass numbers do NOT tell us the number of neutrons in an isotope. To find the number of neutrons in an isotope, you must take the mass number and subtract the atomic number # of neutrons = mass number – atomic number How many neutrons are in the nucleus of a ...
chapter-7-explore-page-248-protons-neutrons
... Any one of these three quantities can be determined if you know the value of the other two quantities. For example: to determine the mass number of an atom, you must know the number of neutrons and the number of protons in the atom. An isotope often is written with the element name followed by t ...
... Any one of these three quantities can be determined if you know the value of the other two quantities. For example: to determine the mass number of an atom, you must know the number of neutrons and the number of protons in the atom. An isotope often is written with the element name followed by t ...
Atoms and Elements
... create gold from base metals and an elixir for everlasting life. Englishman Robert Boyle (1627-1691) is generally credited as the first to study the separate science we call chemistry and the first to perform rigorous experiments. Antoine Lavoisier (1743-1794) discovered the mass of combustion produ ...
... create gold from base metals and an elixir for everlasting life. Englishman Robert Boyle (1627-1691) is generally credited as the first to study the separate science we call chemistry and the first to perform rigorous experiments. Antoine Lavoisier (1743-1794) discovered the mass of combustion produ ...
Chapter 1
... B. Now for Some Neutrons C. Building Bigger Atoms D. Protons and Atomic Number *Notes-The number of protons in the nucleus of an atom give the element its _______atomic number______________. (also the number of electrons) ...
... B. Now for Some Neutrons C. Building Bigger Atoms D. Protons and Atomic Number *Notes-The number of protons in the nucleus of an atom give the element its _______atomic number______________. (also the number of electrons) ...
Branches of Chemistry
... are 90 naturally occurring elements and 21 artificial elements. There are 16 nonmetals, 5 metalloids, and 90 metals. Under normal conditions of room temperature and pressure, 11 elements are gases, and 98 are solids. Only two elements – bromine and mercury – are liquids under normal conditions. An a ...
... are 90 naturally occurring elements and 21 artificial elements. There are 16 nonmetals, 5 metalloids, and 90 metals. Under normal conditions of room temperature and pressure, 11 elements are gases, and 98 are solids. Only two elements – bromine and mercury – are liquids under normal conditions. An a ...
Problem
... General Periodic Trends All three properties can be rationalized by considering effective nuclear charge. Higher Z* yields more tightly bound electrons and: Smaller atomic and ionic size - electrons orbit closer to nucleus Larger Ionization energy - more tightly bound = more energy required to remo ...
... General Periodic Trends All three properties can be rationalized by considering effective nuclear charge. Higher Z* yields more tightly bound electrons and: Smaller atomic and ionic size - electrons orbit closer to nucleus Larger Ionization energy - more tightly bound = more energy required to remo ...
Exam Review - hrsbstaff.ednet.ns.ca
... c) ionic d) compounds of polyatomic ions 29. The most active __ have the highest electronegativities. a) nonmetals b) metalloids c) metals d) noble gases 30. __ compounds have high melting points, conduct electricity in the molten phase, and tend to be soluble in water. a) hydrogen b) metallic c) co ...
... c) ionic d) compounds of polyatomic ions 29. The most active __ have the highest electronegativities. a) nonmetals b) metalloids c) metals d) noble gases 30. __ compounds have high melting points, conduct electricity in the molten phase, and tend to be soluble in water. a) hydrogen b) metallic c) co ...
Science 9
... What are the two types of reactions that involve a gain or a release of energy? Explain each type. ...
... What are the two types of reactions that involve a gain or a release of energy? Explain each type. ...
matter
... • Most of the volume of an atom must be empty space • Most of the mass of an atom must be located in the centre of the atom, he called this the nucleus. • The electrons occupy the empty space, and revolve around the nucleus in a circular motion. • The small proportion of alpha particles which “bounc ...
... • Most of the volume of an atom must be empty space • Most of the mass of an atom must be located in the centre of the atom, he called this the nucleus. • The electrons occupy the empty space, and revolve around the nucleus in a circular motion. • The small proportion of alpha particles which “bounc ...
matter older versions
... • Most of the volume of an atom must be empty space • Most of the mass of an atom must be located in the centre of the atom, he called this the nucleus. • The electrons occupy the empty space, and revolve around the nucleus in a circular motion. • The small proportion of alpha particles which “bounc ...
... • Most of the volume of an atom must be empty space • Most of the mass of an atom must be located in the centre of the atom, he called this the nucleus. • The electrons occupy the empty space, and revolve around the nucleus in a circular motion. • The small proportion of alpha particles which “bounc ...