2011-2012 Summer Packet - Tenafly Public Schools
... D Physical & chemical properties: A physical property is a characteristic of matter that can be determined without changing the chemical formula of the substance. These properties include density, freezing point, or melting point (same point) boiling point, hardness, electrical conductivity, malleab ...
... D Physical & chemical properties: A physical property is a characteristic of matter that can be determined without changing the chemical formula of the substance. These properties include density, freezing point, or melting point (same point) boiling point, hardness, electrical conductivity, malleab ...
Ch 2 PowerPoint
... • O also exists as 03, ozone • Even though "normal" oxygen and ozone are composed of only O atoms, they exhibit very different chemical and physical properties • 02 is essential to life, but 03 is toxic; 02 is odorless my whereas 03 has a sharp, ...
... • O also exists as 03, ozone • Even though "normal" oxygen and ozone are composed of only O atoms, they exhibit very different chemical and physical properties • 02 is essential to life, but 03 is toxic; 02 is odorless my whereas 03 has a sharp, ...
Atom
... Each element is identified by its symbol, placed in a square. The atomic number of the element is shown centered above the symbol. Elements are listed in order of increasing atomic number, from left to right and from top to bottom. Period - each horizontal row of the periodic table. Within a given p ...
... Each element is identified by its symbol, placed in a square. The atomic number of the element is shown centered above the symbol. Elements are listed in order of increasing atomic number, from left to right and from top to bottom. Period - each horizontal row of the periodic table. Within a given p ...
Chapter 3 Notes PDF Version
... Quantum Numbers Like an address, electrons can be identified by where they “reside” in an atom. ¨ The 4 parts to this ‘address’ are called quantum numbers. ¤ Each quantum number further pinpoints an electron. ¤ In other words, quantum numbers separate electrons from one another- they let you te ...
... Quantum Numbers Like an address, electrons can be identified by where they “reside” in an atom. ¨ The 4 parts to this ‘address’ are called quantum numbers. ¤ Each quantum number further pinpoints an electron. ¤ In other words, quantum numbers separate electrons from one another- they let you te ...
C:\Users\Jim\Documents\school stuff\atomic structure.wpd
... 5) Also at around the same time, John Dalton calculates the average atomic masses of several of the elements by using the mass ratios and the assumed chemical formulas. Since Hydrogen always was present in the lowest percent by mass in any compound, it was given the mass of 1 u (average atomic mass ...
... 5) Also at around the same time, John Dalton calculates the average atomic masses of several of the elements by using the mass ratios and the assumed chemical formulas. Since Hydrogen always was present in the lowest percent by mass in any compound, it was given the mass of 1 u (average atomic mass ...
Atoms, Elements, and Compounds
... Marie Curie’s idea was revolutionary because atoms were still believed to be tiny, featureless particles. She decided to test every known element to see if any others would, like uranium, improve the air’s ability to conduct electricity. She found that the element thorium had this property. Pierre C ...
... Marie Curie’s idea was revolutionary because atoms were still believed to be tiny, featureless particles. She decided to test every known element to see if any others would, like uranium, improve the air’s ability to conduct electricity. She found that the element thorium had this property. Pierre C ...
Chapter 4 Note Guide
... Properties of Subatomic Particles What are three subatomic particles? Answer: ___________________________________________________________________________ Protons Based on experiments with elements other than gold, Rutherford concluded _________________________ _______________________________________ ...
... Properties of Subatomic Particles What are three subatomic particles? Answer: ___________________________________________________________________________ Protons Based on experiments with elements other than gold, Rutherford concluded _________________________ _______________________________________ ...
Chapter 4- Elements and the Periodic Table
... formed of small pieces that could not be cut into smaller parts. He used the word atomos, which means "uncuttable;' for these smallest possible pieces. In modern terms, an atom is the smallest particle of an element. The ancient Greeks did not prove the existence of atoms because they did not do exp ...
... formed of small pieces that could not be cut into smaller parts. He used the word atomos, which means "uncuttable;' for these smallest possible pieces. In modern terms, an atom is the smallest particle of an element. The ancient Greeks did not prove the existence of atoms because they did not do exp ...
Atom
... Each element is identified by its symbol, placed in a square. The atomic number of the element is shown centered above the symbol. Elements are listed in order of increasing atomic number, from left to right and from top to bottom. Period - each horizontal row of the periodic table. Within a given p ...
... Each element is identified by its symbol, placed in a square. The atomic number of the element is shown centered above the symbol. Elements are listed in order of increasing atomic number, from left to right and from top to bottom. Period - each horizontal row of the periodic table. Within a given p ...
GCSE Chemistry Textbook sample
... The electrons in an atom are in energy levels, also known as shells. Electrons occupy the lowest available energy levels. The lowest energy level (the first shell) is the one closest to the nucleus and can hold up to two electrons. Up to eight electrons occupy the second energy level (the second she ...
... The electrons in an atom are in energy levels, also known as shells. Electrons occupy the lowest available energy levels. The lowest energy level (the first shell) is the one closest to the nucleus and can hold up to two electrons. Up to eight electrons occupy the second energy level (the second she ...
200 Ways to Pass the Chemistry - Home 15-16
... Elements are arranged on the modern periodic table in order of increasing ………….. 19. Periods are horizontal rows on the Periodic Table. In which energy level are the valence electrons of the elements in Period 3 found? 20. Groups are vertical columns on the Periodic Table. Which group on the periodi ...
... Elements are arranged on the modern periodic table in order of increasing ………….. 19. Periods are horizontal rows on the Periodic Table. In which energy level are the valence electrons of the elements in Period 3 found? 20. Groups are vertical columns on the Periodic Table. Which group on the periodi ...
Introduction to Atoms
... • Use the atomic number given to find the element. • Write the element symbol on the blanks (1st letter of the symbol is capitalized, 2nd (if present) is lower case. • Then write the full name of each element. • Periodic tables can be found in your agenda book or in the textbook inside covers. ...
... • Use the atomic number given to find the element. • Write the element symbol on the blanks (1st letter of the symbol is capitalized, 2nd (if present) is lower case. • Then write the full name of each element. • Periodic tables can be found in your agenda book or in the textbook inside covers. ...
Chapter 2 PowerPoint
... • Plato and Aristotle formulated the notion that there can be no ultimately indivisible particles, so the “atomic” view faded for a number of years. • John Dalton (1766-1844) performed experiments to study the ratios in which elements combine in chemical reactions. He formulated hypotheses and theor ...
... • Plato and Aristotle formulated the notion that there can be no ultimately indivisible particles, so the “atomic” view faded for a number of years. • John Dalton (1766-1844) performed experiments to study the ratios in which elements combine in chemical reactions. He formulated hypotheses and theor ...
Chapter 9 - profpaz.com
... 2. Argon (Ar) has 18 protons, 18 electrons and 22 neutrons. Write a formula designation for an argon atom. Atomic number = Mass number = protons + neutrons = ...
... 2. Argon (Ar) has 18 protons, 18 electrons and 22 neutrons. Write a formula designation for an argon atom. Atomic number = Mass number = protons + neutrons = ...
atoms - SchoolRack
... different numbers of neutrons are called isotopes. For example: Carbon exists as both Carbon 12 and Carbon 14 Carbon 12 ...
... different numbers of neutrons are called isotopes. For example: Carbon exists as both Carbon 12 and Carbon 14 Carbon 12 ...
File
... energy level, the energy of the atom A) decreases B) increases C) remains the same 32. An atom of oxygen is in an excited state. When an electron in this atom moves from the third shell to the second shell, energy is A) emitted by the nucleus B) emitted by the electron C) absorbed by the nucleus D) ...
... energy level, the energy of the atom A) decreases B) increases C) remains the same 32. An atom of oxygen is in an excited state. When an electron in this atom moves from the third shell to the second shell, energy is A) emitted by the nucleus B) emitted by the electron C) absorbed by the nucleus D) ...
Atomic Theory Practice Test
... ____ 22. The B—F bond in BF3 (electronegativity for B is 2.0; electronegativity for F is 4.0) is a. polar covalent. c. nonpolar covalent. b. ionic. d. metallic ____ 23. All of the following are true statements about a molecule EXCEPT a. it is capable of existing on its own. b. it may consist of two ...
... ____ 22. The B—F bond in BF3 (electronegativity for B is 2.0; electronegativity for F is 4.0) is a. polar covalent. c. nonpolar covalent. b. ionic. d. metallic ____ 23. All of the following are true statements about a molecule EXCEPT a. it is capable of existing on its own. b. it may consist of two ...
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.