![Chapter 2](http://s1.studyres.com/store/data/002163354_1-dad5ac20f11c5ee0ca85400b42f4e3a6-300x300.png)
Chapter 2
... While a rough to nearly correct ordering of the elements was known for quite some time, it wasn’t until 1869 that Dmitri Mendeleev (Russia) and Lothar Mayer (Germany) simultaneously and independently proposed modern periodic tables. The columns in the periodic table are called groups or families. El ...
... While a rough to nearly correct ordering of the elements was known for quite some time, it wasn’t until 1869 that Dmitri Mendeleev (Russia) and Lothar Mayer (Germany) simultaneously and independently proposed modern periodic tables. The columns in the periodic table are called groups or families. El ...
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... lanthanides (elements 58 - 71) and actinides (elements 90 - 103). The naturally occurring rare earths are found on earth in only very small amounts. The actinides include most of the well-known elements that take part in or are produced by nuclear reactions. No element with atomic number higher than ...
... lanthanides (elements 58 - 71) and actinides (elements 90 - 103). The naturally occurring rare earths are found on earth in only very small amounts. The actinides include most of the well-known elements that take part in or are produced by nuclear reactions. No element with atomic number higher than ...
Unit 01 Qual Chem
... Pure Substances – Only one type of matter is present Mixtures- More than one type of matter is present but each kind retains its own properties. Can be separated by physical means ...
... Pure Substances – Only one type of matter is present Mixtures- More than one type of matter is present but each kind retains its own properties. Can be separated by physical means ...
One more thing: radial probability distributions Angular functions:
... model says that any given electron interacts with the spherically averaged field of the remaining N-1 electrons. So, the presence of additional electrons changes the orbital energy structure. The biggest change is that for a given principal quantum number, ...
... model says that any given electron interacts with the spherically averaged field of the remaining N-1 electrons. So, the presence of additional electrons changes the orbital energy structure. The biggest change is that for a given principal quantum number, ...
Welcome to my class - Doral Academy Preparatory
... fundamental particles that make up matter. Yet all matter is composed of such particles, which are called atoms. An atom is the smallest particle of an element that retains its identity in a chemical reaction” ...
... fundamental particles that make up matter. Yet all matter is composed of such particles, which are called atoms. An atom is the smallest particle of an element that retains its identity in a chemical reaction” ...
Chemistry Reference Table Review
... 83. What are two properties of most nonmetals? (1) high ionization energy and poor electrical conductivity (2) high ionization energy and good electrical conductivity (3) low ionization energy and poor electrical conductivity (4) low ionization energy and good electrical conductivity 84. Based on Ta ...
... 83. What are two properties of most nonmetals? (1) high ionization energy and poor electrical conductivity (2) high ionization energy and good electrical conductivity (3) low ionization energy and poor electrical conductivity (4) low ionization energy and good electrical conductivity 84. Based on Ta ...
Unit 8 (The Atom) Review Outline
... a. Atomic Number (Z) i. Is the number of protons in the atom. 1. The protons determine the identity of the atom. a. If you change the number of protons, you’ve changed to a different element b. (It is impossible to change the number of protons in a normal chemical reaction. That is why chemical reac ...
... a. Atomic Number (Z) i. Is the number of protons in the atom. 1. The protons determine the identity of the atom. a. If you change the number of protons, you’ve changed to a different element b. (It is impossible to change the number of protons in a normal chemical reaction. That is why chemical reac ...
The Atom
... - electrons move in orbits around the nucleus ( just like a solar system) - orbits or energy levels are located at certain levels from the nucleus _________________________- electrons do not move in a perfect orbit, - only a prediction can be made where an electron will be __________________________ ...
... - electrons move in orbits around the nucleus ( just like a solar system) - orbits or energy levels are located at certain levels from the nucleus _________________________- electrons do not move in a perfect orbit, - only a prediction can be made where an electron will be __________________________ ...
The Atom
... - negative charge particles around the nucleus, electron Bohr Model- Bohr Model 1913, Danish Scientist - electrons move in orbits around the nucleus ( just like a solar system) - orbits or energy levels are located at certain levels from the nucleus Wave Model- electrons do not move in a perfect orb ...
... - negative charge particles around the nucleus, electron Bohr Model- Bohr Model 1913, Danish Scientist - electrons move in orbits around the nucleus ( just like a solar system) - orbits or energy levels are located at certain levels from the nucleus Wave Model- electrons do not move in a perfect orb ...
Structure of an Atom
... Atoms contain a nucleus surrounded by an electron cloud that consists of one or more energy levels. ...
... Atoms contain a nucleus surrounded by an electron cloud that consists of one or more energy levels. ...
File
... These clouds take on particular shapes based on where an electron with a specific energy is most likely to be found. There is a 90% chance that the electron is somewhere in here. ...
... These clouds take on particular shapes based on where an electron with a specific energy is most likely to be found. There is a 90% chance that the electron is somewhere in here. ...
Note taker: ATOMS AND THE PERIODIC TABLE
... Electrons are in a higher energy levels as you move down a group; they are further away from the nucleus, and thus easier to remove. • Trend: _________________________________________________ • Why? The increasing charge in the nucleus as you move across a period exerts greater ”pull” on the electro ...
... Electrons are in a higher energy levels as you move down a group; they are further away from the nucleus, and thus easier to remove. • Trend: _________________________________________________ • Why? The increasing charge in the nucleus as you move across a period exerts greater ”pull” on the electro ...
Interpreting Atomic Structure
... The gold foil experiment resulted in the discovery of the nucleus. According to Rutherford’s model, an atom was mostly open space. The “6+” in the model means that there are six protons in the nucleus. ...
... The gold foil experiment resulted in the discovery of the nucleus. According to Rutherford’s model, an atom was mostly open space. The “6+” in the model means that there are six protons in the nucleus. ...
The Periodic Table of the Elements
... Elements within a group share several common properties. Periods Rows of elements are called periods. The period numbers increase as you go from top to bottom on the periodic table. The number of elements in a period increases as you move down the periodic table. ...
... Elements within a group share several common properties. Periods Rows of elements are called periods. The period numbers increase as you go from top to bottom on the periodic table. The number of elements in a period increases as you move down the periodic table. ...
ATOM - wvhs.wlwv.k12.or.us
... Father of the Modern Atom ● In 1808, this English schoolteacher proposed: 1) All elements are composed of tiny indivisible particles called atoms. 2) Atoms of the same element are identical. Atoms of different elements are different. ...
... Father of the Modern Atom ● In 1808, this English schoolteacher proposed: 1) All elements are composed of tiny indivisible particles called atoms. 2) Atoms of the same element are identical. Atoms of different elements are different. ...
Note taker: ATOMS AND THE PERIODIC TABLE
... Electrons are in a higher energy levels as you move down a group; they are further away from the nucleus, and thus easier to remove. • Trend: _________________________________________________ • Why? The increasing charge in the nucleus as you move across a period exerts greater ”pull” on the electro ...
... Electrons are in a higher energy levels as you move down a group; they are further away from the nucleus, and thus easier to remove. • Trend: _________________________________________________ • Why? The increasing charge in the nucleus as you move across a period exerts greater ”pull” on the electro ...
Note taker: ATOMS AND THE PERIODIC TABLE
... Electrons are in a higher energy levels as you move down a group; they are further away from the nucleus, and thus easier to remove. • Trend: _________________________________________________ • Why? The increasing charge in the nucleus as you move across a period exerts greater ”pull” on the electro ...
... Electrons are in a higher energy levels as you move down a group; they are further away from the nucleus, and thus easier to remove. • Trend: _________________________________________________ • Why? The increasing charge in the nucleus as you move across a period exerts greater ”pull” on the electro ...
File - Norris Science
... the tiny alpha particles would pass through the gold atoms and fly straight into the screen. ...
... the tiny alpha particles would pass through the gold atoms and fly straight into the screen. ...
Notes: ATOMS AND THE PERIODIC TABLE Atomic Structure: • : the
... The increasing charge in the nucleus as you move across a period exerts greater ”pull” on the electrons; it requires more energy to remove an electron. ...
... The increasing charge in the nucleus as you move across a period exerts greater ”pull” on the electrons; it requires more energy to remove an electron. ...
OCR AS LEVEL CHEMISTRY A 1.1.1 ATOMS 1.2.1 ELECTRON
... State which two elements from the first twenty elements of the modern Periodic Table are not arranged in order of increasing atomic mass. ...
... State which two elements from the first twenty elements of the modern Periodic Table are not arranged in order of increasing atomic mass. ...
Unit V: Atomic Theory Vocabulary: atoms, ions, compounds
... Energy level diagram: As we get further from the nucleus, the energy levels get closer together. Notice that the 4s orbital will fill before the 3d. ...
... Energy level diagram: As we get further from the nucleus, the energy levels get closer together. Notice that the 4s orbital will fill before the 3d. ...
Atomic Theory - Hicksville Public Schools
... The number of valence electrons directly relates to the chemical properties of an element 1. valence electrons match the group number in the upper sections of the periodic table b. Kernel - the electrons of the atom excluding the valence electrons (inner or core electrons) c. Period # (# on side of ...
... The number of valence electrons directly relates to the chemical properties of an element 1. valence electrons match the group number in the upper sections of the periodic table b. Kernel - the electrons of the atom excluding the valence electrons (inner or core electrons) c. Period # (# on side of ...
File
... He got the idea that everything was made of small bits by looking at sand on the beach. He pounded up materials in his pestle and mortar until he had reduced them to smaller and ...
... He got the idea that everything was made of small bits by looking at sand on the beach. He pounded up materials in his pestle and mortar until he had reduced them to smaller and ...
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.