III. Periodic Trends
... For most atoms, the energy released when an e- is added. (in kJ/mol) Periodic Trend 1. Electron affinity slightly decreases down a group. 2. Electron affinity generally tends to increase across a period. ...
... For most atoms, the energy released when an e- is added. (in kJ/mol) Periodic Trend 1. Electron affinity slightly decreases down a group. 2. Electron affinity generally tends to increase across a period. ...
File - Mr. Henshaw`s Lab
... A. Atoms are made of protons, neutrons, and electrons. B . All atoms of a given element are identical C . Atoms are neither created nor destroyed in chemical ...
... A. Atoms are made of protons, neutrons, and electrons. B . All atoms of a given element are identical C . Atoms are neither created nor destroyed in chemical ...
Eighth Grade Review - PAMS-Doyle
... Chemical reactions are classified into two broad types: ones in which energy is released (exothermic) and ones in which energy is ...
... Chemical reactions are classified into two broad types: ones in which energy is released (exothermic) and ones in which energy is ...
Periodic Table and Elements Review
... 15.) The first, second, third, and fourth ionization energies are 578, 1817, 2745, and 11,577 kJ/mol, respectively. What is probably the charge of an ion of this element, and why? ...
... 15.) The first, second, third, and fourth ionization energies are 578, 1817, 2745, and 11,577 kJ/mol, respectively. What is probably the charge of an ion of this element, and why? ...
Fall Review
... atomic mass vs. atomic number group, period names of elements (Greek, location, planets, people, Latin, synthetic) names of families and groups...alkali metals, alkaline earth metals, transition metals, halogens, noble gases, lanthanide and actinide series, coinage metals, metalloids, essential elem ...
... atomic mass vs. atomic number group, period names of elements (Greek, location, planets, people, Latin, synthetic) names of families and groups...alkali metals, alkaline earth metals, transition metals, halogens, noble gases, lanthanide and actinide series, coinage metals, metalloids, essential elem ...
Document
... of the element symbol surrounded by "dots" to represent the number of electrons in the outer energy level as represented by a Bohr Diagram. ...
... of the element symbol surrounded by "dots" to represent the number of electrons in the outer energy level as represented by a Bohr Diagram. ...
Atomic Number
... • Atoms are the building blocks of all materials • An atom is made of 3 parts: – Protons and Neutrons are in the nucleus (center) – Electrons orbit around the nucleus ...
... • Atoms are the building blocks of all materials • An atom is made of 3 parts: – Protons and Neutrons are in the nucleus (center) – Electrons orbit around the nucleus ...
ATOMS, MOLECULES and IONS
... elements are called noble, or inert (ie; unreactive) gases. Elements belonging to a certain group all exhibit similar chemical properties. ...
... elements are called noble, or inert (ie; unreactive) gases. Elements belonging to a certain group all exhibit similar chemical properties. ...
Atomic Structure
... (Figure 18.1) this nuclide is neutron-poor, so it must do something to decrease the number of protons or increase the number of neutrons. ...
... (Figure 18.1) this nuclide is neutron-poor, so it must do something to decrease the number of protons or increase the number of neutrons. ...
Chapter 5: The Periodic Law
... Hydrogen: One of a Kind • It has 1 valence electron with a high ionization energy but will form a + ion. It is a nonmetal and a gas at room temperature which is odorless, colorless and also diatomic (H2).“Most of the Earth’s hydrogen is combined with oxygen as water”. Remember… it also combines rea ...
... Hydrogen: One of a Kind • It has 1 valence electron with a high ionization energy but will form a + ion. It is a nonmetal and a gas at room temperature which is odorless, colorless and also diatomic (H2).“Most of the Earth’s hydrogen is combined with oxygen as water”. Remember… it also combines rea ...
Chemistry Study Guide Chapter 4
... (h) Ground state: the state of lowest energy for an atom. (i) Excited state: any state of higher energy for an atom. (j) Atomic mass: the weighted average of all the isotopes of an element. (k) Quantum Leap: change of an electron from one energy state to another within an atom. (l) Photon: small pac ...
... (h) Ground state: the state of lowest energy for an atom. (i) Excited state: any state of higher energy for an atom. (j) Atomic mass: the weighted average of all the isotopes of an element. (k) Quantum Leap: change of an electron from one energy state to another within an atom. (l) Photon: small pac ...
CHAPTER 2 The Chemical Context of Life Elements and
... This information should be reviewed before the scheduled class lecture on CH 2. This is information which I presume you have studied in high school. There is no need to define each term below; simply make sure you understand each term and can use/apply it. I recommend skimming these sections of your ...
... This information should be reviewed before the scheduled class lecture on CH 2. This is information which I presume you have studied in high school. There is no need to define each term below; simply make sure you understand each term and can use/apply it. I recommend skimming these sections of your ...
Regents questions
... Referring to a periodic table, arrange (as much as possible) the atoms 15P, 16S, 33As, and 34Se in order of increasing size. (Atomic numbers are given to help you locate the atoms quickly in the table.) ...
... Referring to a periodic table, arrange (as much as possible) the atoms 15P, 16S, 33As, and 34Se in order of increasing size. (Atomic numbers are given to help you locate the atoms quickly in the table.) ...
Modern Atomic Theory: Electron Cloud Model
... Austrian scientists Schrodinger and Heisenberg revised Bohr’s model. Stated electrons do not travel in definite path as Bohr suggested. exact path of moving electrons can not be predicted. Where electrons are likely to be found is region called electron clouds. ...
... Austrian scientists Schrodinger and Heisenberg revised Bohr’s model. Stated electrons do not travel in definite path as Bohr suggested. exact path of moving electrons can not be predicted. Where electrons are likely to be found is region called electron clouds. ...
1. models of the atom
... He calls the dense center of the atom the nucleus. His model is called the nuclear model It looks like a peach that is cut in half ...
... He calls the dense center of the atom the nucleus. His model is called the nuclear model It looks like a peach that is cut in half ...
Chemistry Honors Semester One Final Exam Review 2014 1. Define
... 58. A prospector finds 39.39 g of pure gold (atomic mass 196.9665 amu). How many atoms are there? 59. Visible light, X rays, infrared radiation, and radio waves all have the same ________. 60. For electromagnetic radiation, what does c (the speed of light) equal? 61. Because c, the speed of electrom ...
... 58. A prospector finds 39.39 g of pure gold (atomic mass 196.9665 amu). How many atoms are there? 59. Visible light, X rays, infrared radiation, and radio waves all have the same ________. 60. For electromagnetic radiation, what does c (the speed of light) equal? 61. Because c, the speed of electrom ...
Atomic Theories Timeline
... elements from which all matter is made • Everything is composed of small atoms moving in a void • Some atoms are round, pointy, oily, have hooks, etc. to account for their properties • Ideas rejected by leading philosophers because void = no existence ...
... elements from which all matter is made • Everything is composed of small atoms moving in a void • Some atoms are round, pointy, oily, have hooks, etc. to account for their properties • Ideas rejected by leading philosophers because void = no existence ...
Periodicity
... elements that were not known yet. He predicted their existence and the properties they should have. These elements were later discovered and the properties he predicted were very accurate for the time. His work “can be thought of as similar to putting together a large puzzle.” (Heath Chemistry) ...
... elements that were not known yet. He predicted their existence and the properties they should have. These elements were later discovered and the properties he predicted were very accurate for the time. His work “can be thought of as similar to putting together a large puzzle.” (Heath Chemistry) ...
CHEM 1305 - HCC Learning Web
... PART II – Show your work: (8 points each) 21a. Element X has natural isotopes; X-63 (62.940amu) and X-65 (64.928amu). Calculate the atomic mass of element X given the abundance of X-63 is 69.17% b. Which element corresponds to each of the following electron configuration? i. 1S2 2S2 2P5 ii. 1S2 2S2 ...
... PART II – Show your work: (8 points each) 21a. Element X has natural isotopes; X-63 (62.940amu) and X-65 (64.928amu). Calculate the atomic mass of element X given the abundance of X-63 is 69.17% b. Which element corresponds to each of the following electron configuration? i. 1S2 2S2 2P5 ii. 1S2 2S2 ...