Name
... electrons orbit the nucleus like planets around the sun first mental model of the atom; “atomos” electrons exist in electron cloud where there is a 90% probability of finding the electron electrons are housed in energy levels filling the lowest energy level first proved the existence of atoms as sma ...
... electrons orbit the nucleus like planets around the sun first mental model of the atom; “atomos” electrons exist in electron cloud where there is a 90% probability of finding the electron electrons are housed in energy levels filling the lowest energy level first proved the existence of atoms as sma ...
CHAPTER 1, MATTER AND CHANGE Section 1, Chemistry Is a
... A chemical is any substance that has a definite composition. Section 2, Matter and Its Properties Mass is a measure of the amount of matter. (Use a balance.) Matter is anything that has mass and takes up space. Basic building blocks of matter: ! An atom is the smallest unit of an element that mainta ...
... A chemical is any substance that has a definite composition. Section 2, Matter and Its Properties Mass is a measure of the amount of matter. (Use a balance.) Matter is anything that has mass and takes up space. Basic building blocks of matter: ! An atom is the smallest unit of an element that mainta ...
Elements, Compounds and Mixtures
... DO NOW – see board for example 1. Cut the INB template out and glue along the narrow tabs into notebook. 2. Fold each side back and add notes under each section. 3. You will refer back to this page several times as you view this presentation. ...
... DO NOW – see board for example 1. Cut the INB template out and glue along the narrow tabs into notebook. 2. Fold each side back and add notes under each section. 3. You will refer back to this page several times as you view this presentation. ...
1.2 Basic Atomic Theory Electrical structure of matter
... the ozone layer with our air conditioners and underarm deodorants and cause everybody to get cancer? Obviously we’re not … and we can’t … and it’s a hoax. Evidence is mounting all the time that ozone depletion is, if occurring at all, is not doing so at an alarming rate .…” ...
... the ozone layer with our air conditioners and underarm deodorants and cause everybody to get cancer? Obviously we’re not … and we can’t … and it’s a hoax. Evidence is mounting all the time that ozone depletion is, if occurring at all, is not doing so at an alarming rate .…” ...
ISOTOPES
... all atoms of each element were the same. According to the model of atomic structure we have been developing, this would mean that each atom of an element would have the same number of protons, electrons, and neutrons as every other atom of the element. Thus the atomic mass of every atom of an elemen ...
... all atoms of each element were the same. According to the model of atomic structure we have been developing, this would mean that each atom of an element would have the same number of protons, electrons, and neutrons as every other atom of the element. Thus the atomic mass of every atom of an elemen ...
SUMMARY: Introduction and History of Atomism
... Rutherford was one of Thomson’s distinguished seven. the first to succeed in exploring the _______________ ______________ of atoms Performed famous “________ ________ Experiment” The experimental evidence that led to the Rutherford model was the results of bombarding a thin metal foil with a ...
... Rutherford was one of Thomson’s distinguished seven. the first to succeed in exploring the _______________ ______________ of atoms Performed famous “________ ________ Experiment” The experimental evidence that led to the Rutherford model was the results of bombarding a thin metal foil with a ...
lecture CH2 chem121pikul
... Nucleus and structure of atom Atomic number, Mass Number, Isotopes, Atomic Weight, & Atomic Mass Periodic Table: groups & periods: similar properties within groups Electron structure: valence electrons and electron dot symbols Periodic trends: atomic size and ionization energy ...
... Nucleus and structure of atom Atomic number, Mass Number, Isotopes, Atomic Weight, & Atomic Mass Periodic Table: groups & periods: similar properties within groups Electron structure: valence electrons and electron dot symbols Periodic trends: atomic size and ionization energy ...
Document
... filled. • The lanthanides and actinides have their f orbitals being filled. • The actinides and lanthanide elements are collectively referred to as the f-block metals. • Note that the 3d orbitals fill after the 4s orbital. Similarly, the 4f orbitals fill after the 5d orbitals. ...
... filled. • The lanthanides and actinides have their f orbitals being filled. • The actinides and lanthanide elements are collectively referred to as the f-block metals. • Note that the 3d orbitals fill after the 4s orbital. Similarly, the 4f orbitals fill after the 5d orbitals. ...
Chemistry 1 Revision: Metals and their uses
... Complete the following using the periodic table to help: H2O: ........... atoms of h.......................... .......... atoms of o....................... ...
... Complete the following using the periodic table to help: H2O: ........... atoms of h.......................... .......... atoms of o....................... ...
History of the Atom
... o All substances are made of atoms; atoms are small particles that cannot be created, divided, or destroyed. o Atoms of the same element are exactly alike, and atoms of different elements are different o Atoms join with other atoms to make new substances Calculated the atomic weights of many vario ...
... o All substances are made of atoms; atoms are small particles that cannot be created, divided, or destroyed. o Atoms of the same element are exactly alike, and atoms of different elements are different o Atoms join with other atoms to make new substances Calculated the atomic weights of many vario ...
Rule of Solid Solubility
... must be with in 15 % of each other. • Crystal Structure: the type of crystal structure must be same. • Chemical Valence: The valence of the two elements must differ by no more than one. • Electro negativity: It must be nearly equal if not, a compound may be formed as a result of the difference in af ...
... must be with in 15 % of each other. • Crystal Structure: the type of crystal structure must be same. • Chemical Valence: The valence of the two elements must differ by no more than one. • Electro negativity: It must be nearly equal if not, a compound may be formed as a result of the difference in af ...
Review Questions: Name Period 1. The atom (smallest unit of an
... 11. What is the atomic number of the element represented?________________________ 12. What is the atom represented in the Bohr model?______________________ 13. An electron always carries a negative charge. A proton carries the exact opposite charge. A proton has a (positive, negative, neutral) 14. I ...
... 11. What is the atomic number of the element represented?________________________ 12. What is the atom represented in the Bohr model?______________________ 13. An electron always carries a negative charge. A proton carries the exact opposite charge. A proton has a (positive, negative, neutral) 14. I ...
NYS Regents Chemistry June 21, 2002
... 1: II. PERIODIC TABLE\1. Properties of Elements\A. Metals\1. Metals - (32) 2: II. PERIODIC TABLE\2. Valence Electrons\A. Electron / Ionic Configuration\2. Ionic Configuration - (10, 30) 2: II. PERIODIC TABLE\4. Properties of Periods\C. Electronegativity\1. Electronegativity - (11, 13) 1: II. PERIODI ...
... 1: II. PERIODIC TABLE\1. Properties of Elements\A. Metals\1. Metals - (32) 2: II. PERIODIC TABLE\2. Valence Electrons\A. Electron / Ionic Configuration\2. Ionic Configuration - (10, 30) 2: II. PERIODIC TABLE\4. Properties of Periods\C. Electronegativity\1. Electronegativity - (11, 13) 1: II. PERIODI ...
HighFour Chemistry Round 1 Category C: Grades 9 – 10 Thursday
... equivalent to the atomic number because the number of protons remains unchanged during reactions. Referring to Table 24 (Periodic Table) of the Chemistry Data Booklet, the element with an atomic number of 15 is phosphorus, P. ...
... equivalent to the atomic number because the number of protons remains unchanged during reactions. Referring to Table 24 (Periodic Table) of the Chemistry Data Booklet, the element with an atomic number of 15 is phosphorus, P. ...
Chemistry Test #1 Study Guide © Chris Khan
... Ion—atom with + or – charge; Cation—net positive charge; Anion—net negative charge Allotrope—one of two or more distinct forms of an element Organic Compounds have carbon while Inorganic don’t Ionic Compounds—have a metal and a nonmetal Molecular Compounds—have two of the same, not both metal and no ...
... Ion—atom with + or – charge; Cation—net positive charge; Anion—net negative charge Allotrope—one of two or more distinct forms of an element Organic Compounds have carbon while Inorganic don’t Ionic Compounds—have a metal and a nonmetal Molecular Compounds—have two of the same, not both metal and no ...
Chapter 4, Lesson 2: The Periodic Table
... Note: It is often confusing for students to see the terms “atom” and “element” used interchangeably as if they are the same thing. Explain to students that an atom is the smallest particle or “building block” of a substance. An element is a substance made up of all the same type of atom. For instan ...
... Note: It is often confusing for students to see the terms “atom” and “element” used interchangeably as if they are the same thing. Explain to students that an atom is the smallest particle or “building block” of a substance. An element is a substance made up of all the same type of atom. For instan ...
Chapter 2
... Nonmetals are on the right side of the periodic table (with the exception Metalloids border the stair-step line (with the exception of Al and Po). Metals are on the left side of the chart. The subscript to the right of the symbol of an element tells the number of atoms of that element in one molecul ...
... Nonmetals are on the right side of the periodic table (with the exception Metalloids border the stair-step line (with the exception of Al and Po). Metals are on the left side of the chart. The subscript to the right of the symbol of an element tells the number of atoms of that element in one molecul ...
Summary of Atomic Theories File
... 6. The electron cannot exist in between orbits. Although the Bohr model adequately explained how atomic spectra worked, it failed to explain certain aspects of multi-electron atoms. In 1924, the French physicist Louis de Broglie suggested that, like light, electrons could act as both particles and w ...
... 6. The electron cannot exist in between orbits. Although the Bohr model adequately explained how atomic spectra worked, it failed to explain certain aspects of multi-electron atoms. In 1924, the French physicist Louis de Broglie suggested that, like light, electrons could act as both particles and w ...
Chemistry (B) Final Exam Study Guide 1
... ____ 50. How does the energy of an electron change when the electron moves closer to the nucleus? a. It decreases. c. It stays the same. b. It increases. d. It doubles. ____ 51. What is the shape of the 3p atomic orbital? a. sphere c. bar b. dumbbell d. two perpendicular dumbbells ____ 52. What is ...
... ____ 50. How does the energy of an electron change when the electron moves closer to the nucleus? a. It decreases. c. It stays the same. b. It increases. d. It doubles. ____ 51. What is the shape of the 3p atomic orbital? a. sphere c. bar b. dumbbell d. two perpendicular dumbbells ____ 52. What is ...
Chemical Formulas
... HC 2 H 3 O 2 (vinegar), NaHCO 3 (baking soda), NH 4 (ammonia), and C 6 H 12 O 6 (glucose). ...
... HC 2 H 3 O 2 (vinegar), NaHCO 3 (baking soda), NH 4 (ammonia), and C 6 H 12 O 6 (glucose). ...
Bio_130_files/Chemistry Review
... – Elements are the simplest form of matter with unique chemical properties. They are charted on the periodic table based on some of their chemical characteristics. • There are 24 major elements that have various roles in the body. – These include structural, enzymatic, and homeostatic balance. • Com ...
... – Elements are the simplest form of matter with unique chemical properties. They are charted on the periodic table based on some of their chemical characteristics. • There are 24 major elements that have various roles in the body. – These include structural, enzymatic, and homeostatic balance. • Com ...
Atomic Structure DEMOCRITUS JOHN DALTON
... __________ _________, similarities in their properties occur in a regular pattern. a) Atomic mass b) Atomic number c) Atomic radius Moseley created the modern periodic table when he determined that elements should be placed in order of increasing atomic number (# of protons). It’s a shame that WWI t ...
... __________ _________, similarities in their properties occur in a regular pattern. a) Atomic mass b) Atomic number c) Atomic radius Moseley created the modern periodic table when he determined that elements should be placed in order of increasing atomic number (# of protons). It’s a shame that WWI t ...
Atomic Theory
... schoolteacher proposed his own atomic theory that became widely accepted. Dalton’s Atomic Theory: ...
... schoolteacher proposed his own atomic theory that became widely accepted. Dalton’s Atomic Theory: ...
Periodic table
The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number (number of protons in the nucleus), electron configurations, and recurring chemical properties. The table also shows four rectangular blocks: s-, p- d- and f-block. In general, within one row (period) the elements are metals on the lefthand side, and non-metals on the righthand side.The rows of the table are called periods; the columns are called groups. Six groups (columns) have names as well as numbers: for example, group 17 elements are the halogens; and group 18, the noble gases. The periodic table can be used to derive relationships between the properties of the elements, and predict the properties of new elements yet to be discovered or synthesized. The periodic table provides a useful framework for analyzing chemical behavior, and is widely used in chemistry and other sciences.Although precursors exist, Dmitri Mendeleev is generally credited with the publication, in 1869, of the first widely recognized periodic table. He developed his table to illustrate periodic trends in the properties of the then-known elements. Mendeleev also predicted some properties of then-unknown elements that would be expected to fill gaps in this table. Most of his predictions were proved correct when the elements in question were subsequently discovered. Mendeleev's periodic table has since been expanded and refined with the discovery or synthesis of further new elements and the development of new theoretical models to explain chemical behavior.All elements from atomic numbers 1 (hydrogen) to 118 (ununoctium) have been discovered or reportedly synthesized, with elements 113, 115, 117, and 118 having yet to be confirmed. The first 94 elements exist naturally, although some are found only in trace amounts and were synthesized in laboratories before being found in nature. Elements with atomic numbers from 95 to 118 have only been synthesized in laboratories. It has been shown that einsteinium and fermium once occurred in nature but currently do not. Synthesis of elements having higher atomic numbers is being pursued. Numerous synthetic radionuclides of naturally occurring elements have also been produced in laboratories.