• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Name
Name

... matter is made up of tiny particles that cannot be divided. He called these particles ...
Multivalent Ionic Compounds
Multivalent Ionic Compounds

... Step 1: decide if we use Ti3+or Ti4+ and F-, note that the 4 in the compound (TiF4) crossed down from the Ti so we must have used Ti4+. Step 2: name the multivalent metal as is on the periodic table, Titanium, add the roman numeral (IV) to indicate the charge used and then add the nonmetal, changing ...
11 - Ingrum.com
11 - Ingrum.com

... Each of the principal energy levels is broken down into one or more sublevels. The first principal energy level has one sublevel. The second principal energy level has two sublevels. The third principal energy level has three sublevels, and so on. We use numbers and symbols to indicate which princi ...
Name Block Hon 1 Chemistry I – Ms. Elder Chapter 3 Atomic
Name Block Hon 1 Chemistry I – Ms. Elder Chapter 3 Atomic

... 3-3 Modern Atomic Theory What are the names and properties of the 3 subatomic particles? How can you determine the # of protons, neutrons, and electrons in an atom/ion? What is an isotope? What is atomic mass? ...
Pauling Scale of Electronegativities for the Various Elements
Pauling Scale of Electronegativities for the Various Elements

Chapter 2 "Elements, Atoms, and the Periodic Table"
Chapter 2 "Elements, Atoms, and the Periodic Table"

... Most elements in their pure form exist as individual atoms. For example, a macroscopic chunk of iron metal is composed, microscopically, of individual atoms. Some elements, however, exist as groups of atoms called molecules, as discussed in Chapter 1 "Chemistry, Matter, and Measurement". Several imp ...
The Atom
The Atom

... - atoms that have the same number of protons but have different numbers of neutrons.  Some isotopes are radioactive.  Otherwise they are mostly the same as the regular atom. ...
Chapter 4 Early Atomic Theory
Chapter 4 Early Atomic Theory

... If two elements form more that one compound, the ratio of the second element that combines with 1 gram of the first element in each is a simple whole number. • In hydrogen peroxide 32.0 g oxygen reacts with 2.0 g hydrogen (H2O2) O:H = 16:1 • Ratio of the masses of oxygen in hydrogen peroxide and wat ...
electrons and the structure of atoms
electrons and the structure of atoms

... The ancient Greek Democritus first proposed that matter is made up of small, indivisible particles that he called atoms. John Dalton made the first accepted theory on atoms almost 2000 years after the work of Democritus. Dalton’s atomic theory included that all atoms of an element are alike, the ato ...
ExamView - chap 4 retake 2013.tst
ExamView - chap 4 retake 2013.tst

National 4/5 Chemistry Homework
National 4/5 Chemistry Homework

... o A chemical reaction can be shown by precipitation (a solid forming in a solution) o A chemical reaction can be shown by effervescence (a gas bubbling form a solution) o An exothermic reaction gives out heat energy o An endothermic reaction takes in heat energy o I can give examples of everyday che ...
Electronegativity
Electronegativity

... The greater the number of protons in a nucleus, the greater the attraction to the electrons in the covalent bond, resulting in higher electronegativity. However, full energy levels of electrons shield the electrons in the bond from the increased attraction of the greater nuclear charge, thus reducin ...
Chapter 2
Chapter 2

... Oppositely charged ions attract, attractive force is coulombic. Ionic bond is non-directional, ions get attracted to one another in any direction. Bonding energies are high => 2 to 5 eV/atom,molecule,ion Hard materials, brittle, high melting temperature, electrically and thermally insulating Chapter ...
Electronegativity - Sierra Vista Chemistry
Electronegativity - Sierra Vista Chemistry

... The greater the number of protons in a nucleus, the greater the attraction to the electrons in the covalent bond, resulting in higher electronegativity. However, full energy levels of electrons shield the electrons in the bond from the increased attraction of the greater nuclear charge, thus reducin ...
Living Things - Peoria Public Schools
Living Things - Peoria Public Schools

Chapter 4- Elements and the Periodic Table
Chapter 4- Elements and the Periodic Table

... mass of just one proton. A proton and a neutron are about equal in mass. Together, the protons and neutrons make up nearly all the mass of an atom. Figure 8 compares the charges and masses of the three atomic particles. Atoms are too small to be described easily by everyday units of mass, such as gr ...
Chapter 7 Periodic Properties of the Elements
Chapter 7 Periodic Properties of the Elements

... • Alkaline earth metals have higher densities and melting points than alkali metals. • Their ionization energies are low, but not as low as those of alkali metals. © 2012 Pearson Education, Inc. ...
+ H 2 (g)
+ H 2 (g)

Investigating Atoms and Atomic Theory
Investigating Atoms and Atomic Theory

... numbers of neutrons, they also have different mass numbers. Despite these differences, isotopes are chemically alike because they have identical numbers of protons and electrons, which are the subatomic particles responsible for chemical behavior. ...
Chemistry I Accelerated StudyGuideline
Chemistry I Accelerated StudyGuideline

Atoms and Elements
Atoms and Elements

... different kinds of emissions  alpha, a, particles with a mass 4x H atom and + charge  beta, b, particles with a mass ~1/2000th H atom and – ...
atomic - SandersScienceStuff
atomic - SandersScienceStuff

... 2. Dalton’s (1766-1844) experimentation on matter led him to believe: b. All matter is composed of atoms c. All the atoms for a given element were identical*. Atoms of a specific element are different from atoms of another element. d. Atoms cannot be created, divided* or destroyed. e. Atoms could co ...
AP Chemistry Unit 1 Notes Chapters 1
AP Chemistry Unit 1 Notes Chapters 1

... Acids with anions whose name ends with –ide are named by changing the –ide to –ic, and adding the prefix hydro- with the word acid ...
Chapter 4 Elements and the Periodic Table
Chapter 4 Elements and the Periodic Table

... How is the periodic table organized? Imagine you have a piece of aluminum foil, and you cut it in half. If each of these pieces is cut in half a second, third, and fourth time, the pieces become smaller but are still aluminum. How small must a piece be so that at the next cut it will no longer be al ...
Chapter 4 Elements and the Periodic Table
Chapter 4 Elements and the Periodic Table

... How is the periodic table organized? Imagine you have a piece of aluminum foil, and you cut it in half. If each of these pieces is cut in half a second, third, and fourth time, the pieces become smaller but are still aluminum. How small must a piece be so that at the next cut it will no longer be al ...
< 1 ... 38 39 40 41 42 43 44 45 46 ... 256 >

Extended periodic table

An extended periodic table theorizes about elements beyond element 118 (beyond period 7, or row 7). Currently seven periods in the periodic table of chemical elements are known and proven, culminating with atomic number 118. If further elements with higher atomic numbers than this are discovered, they will be placed in additional periods, laid out (as with the existing periods) to illustrate periodically recurring trends in the properties of the elements concerned. Any additional periods are expected to contain a larger number of elements than the seventh period, as they are calculated to have an additional so-called g-block, containing at least 18 elements with partially filled g-orbitals in each period. An eight-period table containing this block was suggested by Glenn T. Seaborg in 1969. IUPAC defines an element to exist if its lifetime is longer than 10−14 seconds, which is the time it takes for the nucleus to form an electronic cloud.No elements in this region have been synthesized or discovered in nature. The first element of the g-block may have atomic number 121, and thus would have the systematic name unbiunium. Elements in this region are likely to be highly unstable with respect to radioactive decay, and have extremely short half lives, although element 126 is hypothesized to be within an island of stability that is resistant to fission but not to alpha decay. It is not clear how many elements beyond the expected island of stability are physically possible, if period 8 is complete, or if there is a period 9.According to the orbital approximation in quantum mechanical descriptions of atomic structure, the g-block would correspond to elements with partially filled g-orbitals, but spin-orbit coupling effects reduce the validity of the orbital approximation substantially for elements of high atomic number. While Seaborg's version of the extended period had the heavier elements following the pattern set by lighter elements, as it did not take into account relativistic effects, models that take relativistic effects into account do not. Pekka Pyykkö and B. Fricke used computer modeling to calculate the positions of elements up to Z = 184 (comprising periods 8, 9, and the beginning of 10), and found that several were displaced from the Madelung rule.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report