2.1 Atomic Theory of Matter
... If two elements, A and B, form more than one compound, the masses of B that combine with a given mass of A are in the ratio of small whole numbers. Dalton predicted this law and observed it while developing his atomic theory. When two or more compounds exist from the same elements, they can no ...
... If two elements, A and B, form more than one compound, the masses of B that combine with a given mass of A are in the ratio of small whole numbers. Dalton predicted this law and observed it while developing his atomic theory. When two or more compounds exist from the same elements, they can no ...
Back - WasmundScience
... C1-100-The answer is… Which scientist came up with the idea that all matter is made up of tiny pieces of matter and named them atomos? Democritus Back ...
... C1-100-The answer is… Which scientist came up with the idea that all matter is made up of tiny pieces of matter and named them atomos? Democritus Back ...
chapter 2
... a. Alkali Metals – most reactive metals, react violently with water b. Alkaline Earth Metals – reactive metals but less so than alkali c. Halogens – most reactive non-metals, most are poisonous gases d. Noble Gases – do not react 3. If a noble gas could form a +1 ion, which of the noble gases would ...
... a. Alkali Metals – most reactive metals, react violently with water b. Alkaline Earth Metals – reactive metals but less so than alkali c. Halogens – most reactive non-metals, most are poisonous gases d. Noble Gases – do not react 3. If a noble gas could form a +1 ion, which of the noble gases would ...
Ch#4 Atoms and Elements
... • 115 known: 88 found in nature, others are man made. • Most of the know elements are found on the Periodic Chart handing on the wall. • One or two letters are used to represent an element and they are called the symbol • Some elements are solids (black), some are liquids (blue) and some are gases ( ...
... • 115 known: 88 found in nature, others are man made. • Most of the know elements are found on the Periodic Chart handing on the wall. • One or two letters are used to represent an element and they are called the symbol • Some elements are solids (black), some are liquids (blue) and some are gases ( ...
Chapter 3 Stoichiometry: Chemical Calculations
... 6.02x1023 H atoms in 1.008 grams of H (atomic mass of H = 1.008) Example 3.2: Consider titanium (Ti), the “space-age” metal discussed at the end of chapter 1. Taking Avogadro’s Number to be 6.02x10 23, calculate a) the mass of a titanium atom b) the number of atoms in a 10.0g sample c) the number of ...
... 6.02x1023 H atoms in 1.008 grams of H (atomic mass of H = 1.008) Example 3.2: Consider titanium (Ti), the “space-age” metal discussed at the end of chapter 1. Taking Avogadro’s Number to be 6.02x10 23, calculate a) the mass of a titanium atom b) the number of atoms in a 10.0g sample c) the number of ...
atoms
... Ordinary “lead” pencils actually are made of a form of carbon called graphite. If a pencil line is 0.35 mm wide and the diameter of a carbon atom is 1.5 1010 m, how many atoms wide is the line? ...
... Ordinary “lead” pencils actually are made of a form of carbon called graphite. If a pencil line is 0.35 mm wide and the diameter of a carbon atom is 1.5 1010 m, how many atoms wide is the line? ...
Stoichiometry
... Dalton’s law of partial pressure: The total pressure exerted by a mixture of gases, that do not interact, equals sum of partial pressures of all gases, if each gas occupies the container on its own. P total = P1 + P2 + P3 + ………… ...
... Dalton’s law of partial pressure: The total pressure exerted by a mixture of gases, that do not interact, equals sum of partial pressures of all gases, if each gas occupies the container on its own. P total = P1 + P2 + P3 + ………… ...
Test 4 Review
... Covalent Bonds. Covalent bonds are bonds formed by sharing electrons. The electrons of one atom are attracted to the protons of another, but neither atom pulls strongly enough to remove an electron from the other. Covalent bonds form when the electronegativity difference between the elements is less ...
... Covalent Bonds. Covalent bonds are bonds formed by sharing electrons. The electrons of one atom are attracted to the protons of another, but neither atom pulls strongly enough to remove an electron from the other. Covalent bonds form when the electronegativity difference between the elements is less ...
Chapter 3
... ______ 9. Which of the following statements of Dalton’s atomic theory describes the law of multiple proportions? a. All matter is composed of atoms. b. Atoms of a given element are identical in size, mass, and other properties. c. Atoms cannot be subdivided, created, or destroyed. d. Atoms of diffe ...
... ______ 9. Which of the following statements of Dalton’s atomic theory describes the law of multiple proportions? a. All matter is composed of atoms. b. Atoms of a given element are identical in size, mass, and other properties. c. Atoms cannot be subdivided, created, or destroyed. d. Atoms of diffe ...
Atoms - AJS Phyiscs and Chemistry
... • Matter is composed of small indivisible particles (atoms) that can be neither created nor destroyed. • All atoms of the same element are identical in mass and size, but different from atoms of other elements. • Atoms exist in an otherwise empty space and are in constant motion. • They may collide ...
... • Matter is composed of small indivisible particles (atoms) that can be neither created nor destroyed. • All atoms of the same element are identical in mass and size, but different from atoms of other elements. • Atoms exist in an otherwise empty space and are in constant motion. • They may collide ...
2.3 Periodic Table and Atomic Theory Bohr Diagrams
... not want to gain or lose electrons. This is why they do not react easily with other elements! ...
... not want to gain or lose electrons. This is why they do not react easily with other elements! ...
Environmental Science
... • Uranium is used in nuclear power. • U238 is the most common isotope. • U235 is needed for nuclear power so mined Uranium is processed before use to get a higher percentage of U235. This is called enrichment. ...
... • Uranium is used in nuclear power. • U238 is the most common isotope. • U235 is needed for nuclear power so mined Uranium is processed before use to get a higher percentage of U235. This is called enrichment. ...
Periodic Table Powerpoint
... Made of only one kind of matter and has definite properties. Elements: Cannot be broken down into other substances by any physical or chemical means. Compounds: A substance made of 2 or more elements that are chemically combined. Examples: water, carbon dioxide ...
... Made of only one kind of matter and has definite properties. Elements: Cannot be broken down into other substances by any physical or chemical means. Compounds: A substance made of 2 or more elements that are chemically combined. Examples: water, carbon dioxide ...
7.4 atomic theory 3
... Alpha helium particles were shot through a piece of gold foil Think aluminum foil but thinner and made out of gold! Alpha helium particles are 8000 times more massive (bigger) than electrons, so Rutherford thought they would knock electrons out of the way, but they did not! ...
... Alpha helium particles were shot through a piece of gold foil Think aluminum foil but thinner and made out of gold! Alpha helium particles are 8000 times more massive (bigger) than electrons, so Rutherford thought they would knock electrons out of the way, but they did not! ...
AP CHEMISTRY SUMMER ASSIGNMENT
... Law of Multiple Proportions: when two elements form a series of compounds, the ratios of the masses of the second element that combine with 1 gram of the first element can always be reduced to small whole numbers. ...
... Law of Multiple Proportions: when two elements form a series of compounds, the ratios of the masses of the second element that combine with 1 gram of the first element can always be reduced to small whole numbers. ...
Atoms and Integers Classwork
... An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud. Each electron carries a negative ch ...
... An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud. Each electron carries a negative ch ...
atomic number
... different numbers of neutrons. • Isotopes are atoms of the same element that have different numbers of neutrons. ...
... different numbers of neutrons. • Isotopes are atoms of the same element that have different numbers of neutrons. ...
Name: Period:______ Table Number:______
... A(n) __________________________ is a pure substance that can not be broken down into any other substance by some physical or chemical method and from which all more complex forms of matter or substances are made when they are combined together in different ways and in different amounts. P. 9, 70, ...
... A(n) __________________________ is a pure substance that can not be broken down into any other substance by some physical or chemical method and from which all more complex forms of matter or substances are made when they are combined together in different ways and in different amounts. P. 9, 70, ...
Atomic Structure and Periodic Table Review WS
... Our model of the atom continues to evolve as new discoveries are made. The first atomic model that was based on scientific experiments came from John Dalton. He believed that each element had a smallest subunit, which he called the atom. He believed the atom could not be subdivided into smaller part ...
... Our model of the atom continues to evolve as new discoveries are made. The first atomic model that was based on scientific experiments came from John Dalton. He believed that each element had a smallest subunit, which he called the atom. He believed the atom could not be subdivided into smaller part ...
FE Exam Review for Chemistry
... How are they affected by changing temperature & pressure? As temperature increases: solid liquid gas As pressure increases: gas liquid solid How do they differ in terms of: Solids > liquids > gases • density (abundance) Gas > liquid > solids • energy / movement • shape & compressibi ...
... How are they affected by changing temperature & pressure? As temperature increases: solid liquid gas As pressure increases: gas liquid solid How do they differ in terms of: Solids > liquids > gases • density (abundance) Gas > liquid > solids • energy / movement • shape & compressibi ...
UNIT 4 ATOMIC THEORY 1. Atomic theory: Dalton`s model
... As the atom is neutral it has the same number of protons as electrons so if we know the atomic number we know the number of protons and electrons of the atom. Sometimes an atom can gain or lose electrons, so that they became charged atoms, then we call them ...
... As the atom is neutral it has the same number of protons as electrons so if we know the atomic number we know the number of protons and electrons of the atom. Sometimes an atom can gain or lose electrons, so that they became charged atoms, then we call them ...
9:20 AM
... NO+ and NO– are also known. Compare the bond orders of these ions with the bond order of NO. Which of the three would you predict to have the shortest bond? Why? NO+ Bond Order = 3 NO Bond Order = 2.5 NO- Bond Order = 2 NO+ will have the shortest bond because it has the highest bond order. ...
... NO+ and NO– are also known. Compare the bond orders of these ions with the bond order of NO. Which of the three would you predict to have the shortest bond? Why? NO+ Bond Order = 3 NO Bond Order = 2.5 NO- Bond Order = 2 NO+ will have the shortest bond because it has the highest bond order. ...
Chapter 2 power point
... Filtration: Separates components of a mixture based upon differences in particle size. Filtration usually involves separating a precipitate from solution. Crystallization: Separation is based upon differences in solubility of the components in a mixture. Distillation: Separation is based upon differ ...
... Filtration: Separates components of a mixture based upon differences in particle size. Filtration usually involves separating a precipitate from solution. Crystallization: Separation is based upon differences in solubility of the components in a mixture. Distillation: Separation is based upon differ ...
History of molecular theory
In chemistry, the history of molecular theory traces the origins of the concept or idea of the existence of strong chemical bonds between two or more atoms.The modern concept of molecules can be traced back towards pre-scientific Greek philosophers such as Leucippus who argued that all the universe is composed of atoms and voids. Circa 450 BC Empedocles imagined fundamental elements (fire (20px), earth (20px), air (20px), and water (20px)) and ""forces"" of attraction and repulsion allowing the elements to interact. Prior to this, Heraclitus had claimed that fire or change was fundamental to our existence, created through the combination of opposite properties. In the Timaeus, Plato, following Pythagoras, considered mathematical entities such as number, point, line and triangle as the fundamental building blocks or elements of this ephemeral world, and considered the four elements of fire, air, water and earth as states of substances through which the true mathematical principles or elements would pass. A fifth element, the incorruptible quintessence aether, was considered to be the fundamental building block of the heavenly bodies. The viewpoint of Leucippus and Empedocles, along with the aether, was accepted by Aristotle and passed to medieval and renaissance Europe. A modern conceptualization of molecules began to develop in the 19th century along with experimental evidence for pure chemical elements and how individual atoms of different chemical substances such as hydrogen and oxygen can combine to form chemically stable molecules such as water molecules.