Chapter 4.3: How Atoms Differ
... When writing radioactive decomposition reactions, the mass numbers (top) and the atomic numbers (bottom) must be equal on both sides. Radioactivity Problems – write the equations for the following radioactive decomposition reactions ...
... When writing radioactive decomposition reactions, the mass numbers (top) and the atomic numbers (bottom) must be equal on both sides. Radioactivity Problems – write the equations for the following radioactive decomposition reactions ...
ATOM Clash of the Titans
... (radius ≈ 7 x 1011 m) the sun. If the dimensions of the solar system had the same proportions as those of the atom, would the earth be closer to or farther away from the sun than it actually is? What assumption did Bohr make in his model of the hydrogen atom regarding angular momentum of the electro ...
... (radius ≈ 7 x 1011 m) the sun. If the dimensions of the solar system had the same proportions as those of the atom, would the earth be closer to or farther away from the sun than it actually is? What assumption did Bohr make in his model of the hydrogen atom regarding angular momentum of the electro ...
Multiple Choice W - Parkway C-2
... 3. In Rutherford’s gold foil experiment, shown in Figure 4-1, alpha particles that bounce straight back from the foil have struck in the gold atoms. 4. The region in which an electron is most likely to be found is called a(an) ...
... 3. In Rutherford’s gold foil experiment, shown in Figure 4-1, alpha particles that bounce straight back from the foil have struck in the gold atoms. 4. The region in which an electron is most likely to be found is called a(an) ...
Modern Theories of Matter
... 5. When excited electrons return to the ground state, they lose excess energy in the form of (1) light, (2) gamma rays, (3) nuclear radiation, (4) sound. 6. Which of the following particles is negatively charged? (1) electron (2) proton (3) neutron (4) cation 7. How many neutrons does ...
... 5. When excited electrons return to the ground state, they lose excess energy in the form of (1) light, (2) gamma rays, (3) nuclear radiation, (4) sound. 6. Which of the following particles is negatively charged? (1) electron (2) proton (3) neutron (4) cation 7. How many neutrons does ...
Name: Period:______ Date: CHEMISTRY Chapter 3 AND Nuclear
... 17. Believed that the earth was made up of 4 elements, water, fire, earth, and air. 18. Proposed the “plum pudding” model of the atom; discovered the electron. 19. converting a neutron into a proton and emitting an electron 20. splitting a large atom into smaller atoms 21. A bucket of water, a pool ...
... 17. Believed that the earth was made up of 4 elements, water, fire, earth, and air. 18. Proposed the “plum pudding” model of the atom; discovered the electron. 19. converting a neutron into a proton and emitting an electron 20. splitting a large atom into smaller atoms 21. A bucket of water, a pool ...
Bohr and Dot Diagrams Powerpoint
... (hydrogen and helium) have one energy level, those in the second row will have two energy levels and so on. Draw a circle to represent the nucleus of the atom. Write the number of protons and the number of neutrons inside this circle. Draw one or more circles around the nucleus depending on which ro ...
... (hydrogen and helium) have one energy level, those in the second row will have two energy levels and so on. Draw a circle to represent the nucleus of the atom. Write the number of protons and the number of neutrons inside this circle. Draw one or more circles around the nucleus depending on which ro ...
Chapter 2 13ed
... 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 not h ...
... 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 not h ...
HonorsChem.final.rev.probs
... 34. Suppose that a balloon is launched when the temperature is 26°C and the barometric pressure is 735 mm Hg. If the balloon’s volume is 20.4 L, what will it be at a height of 10 miles, where the pressure is 110.0 mm Hg and the temperature is 0°C? ...
... 34. Suppose that a balloon is launched when the temperature is 26°C and the barometric pressure is 735 mm Hg. If the balloon’s volume is 20.4 L, what will it be at a height of 10 miles, where the pressure is 110.0 mm Hg and the temperature is 0°C? ...
CHAPTER 3 - THE ATOM
... and the Law of Definite composition could only be explained if atoms existed. Wrote Dalton’s Atomic Theory, which was mostly right. 1. Matter is composed extremely small particles called atoms 2. Atoms are indivisible and indestructible 3. Atoms of a given element are identical in size, mass, and ch ...
... and the Law of Definite composition could only be explained if atoms existed. Wrote Dalton’s Atomic Theory, which was mostly right. 1. Matter is composed extremely small particles called atoms 2. Atoms are indivisible and indestructible 3. Atoms of a given element are identical in size, mass, and ch ...
(null): 110.ReactionsIntro
... in his research lab in 1879. Like many chemists, he had a vivid "learning experience," which led to a heightened interest in laboratory work: While reading a textbook of chemistry I came upon the statement, "nitric acid acts upon copper." I was getting tired of reading such absurd stuff and I was de ...
... in his research lab in 1879. Like many chemists, he had a vivid "learning experience," which led to a heightened interest in laboratory work: While reading a textbook of chemistry I came upon the statement, "nitric acid acts upon copper." I was getting tired of reading such absurd stuff and I was de ...
Atomic Theory
... Dalton’s Atomic Theory • 1 All matter is made up of invisible particles called atoms • 2 All atoms of one element are identical. The atoms of any one element are different from those of all other element. • 3 Chemical change is the union or separation of atoms • 4 Atoms combine in small whole numbe ...
... Dalton’s Atomic Theory • 1 All matter is made up of invisible particles called atoms • 2 All atoms of one element are identical. The atoms of any one element are different from those of all other element. • 3 Chemical change is the union or separation of atoms • 4 Atoms combine in small whole numbe ...
(a) Atoms - Warren County Public Schools
... first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons. It goes down the periodic table like that. At this time, the maximum number of electron orbitals or electron shells for any element is seven. ...
... first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons. It goes down the periodic table like that. At this time, the maximum number of electron orbitals or electron shells for any element is seven. ...
Review Questions
... 5. Find the percent composition of Oxygen in Na2S2O3 __________________________ ...
... 5. Find the percent composition of Oxygen in Na2S2O3 __________________________ ...
Chemical Reactions Chemical Arithmetic
... Oxidation-Reduction Reactions • Oxidation-Reduction (Redox) Reaction- A chemical reaction in which the oxidation numbers of elements change because of a loss or gain of electrons • Oxidation Number- A number that indicates the charge that an atom in a molecule or polyatomic ion would have if all bon ...
... Oxidation-Reduction Reactions • Oxidation-Reduction (Redox) Reaction- A chemical reaction in which the oxidation numbers of elements change because of a loss or gain of electrons • Oxidation Number- A number that indicates the charge that an atom in a molecule or polyatomic ion would have if all bon ...
Summary of Atomic Structure so far…
... • it moves further from the nucleus • it absorbs energy • it does not give off light 6b) When an electron moves from n = 5 to n = 2: • it moves closer to the nucleus • it will release (give off) energy • it will give off light of a specific wavelength (energy), the colour will depend on which atom t ...
... • it moves further from the nucleus • it absorbs energy • it does not give off light 6b) When an electron moves from n = 5 to n = 2: • it moves closer to the nucleus • it will release (give off) energy • it will give off light of a specific wavelength (energy), the colour will depend on which atom t ...
chapter-7-explore-page-248-protons-neutrons
... Today scientists know that a chemical reaction does not change the number of protons in an atom’s nucleus. If the number of protons does not change, the element does not change. But in the late 1800s, scientists discovered that some elements change into other elements spontaneously. An Accidental ...
... Today scientists know that a chemical reaction does not change the number of protons in an atom’s nucleus. If the number of protons does not change, the element does not change. But in the late 1800s, scientists discovered that some elements change into other elements spontaneously. An Accidental ...
Chemistry of Life
... filled outer electron shell • Trying to achieve stability like the Noble Gases ...
... filled outer electron shell • Trying to achieve stability like the Noble Gases ...
Unit 3 Lesson 1
... • In 1808, John Dalton published an atomic theory, stating that all matter is made up of atoms that cannot be created, divided, or destroyed. • This theory also stated that all atoms of a certain element are identical, but they differ from atoms of all other elements. • Every substance is made up of ...
... • In 1808, John Dalton published an atomic theory, stating that all matter is made up of atoms that cannot be created, divided, or destroyed. • This theory also stated that all atoms of a certain element are identical, but they differ from atoms of all other elements. • Every substance is made up of ...
Lesson 1 - The Atom - Hitchcock
... • In 1808, John Dalton published an atomic theory, stating that all matter is made up of atoms that cannot be created, divided, or destroyed. • This theory also stated that all atoms of a certain element are identical, but they differ from atoms of all other elements. • Every substance is made up of ...
... • In 1808, John Dalton published an atomic theory, stating that all matter is made up of atoms that cannot be created, divided, or destroyed. • This theory also stated that all atoms of a certain element are identical, but they differ from atoms of all other elements. • Every substance is made up of ...
Fall Final 2009
... d. All molecules move randomly in zigzag directions. e. All the molecules have the same velocity. ...
... d. All molecules move randomly in zigzag directions. e. All the molecules have the same velocity. ...
Chemistry Review
... d. a bond formed when atoms share electrons e. a combination of two or more substances that are not chemically combined f. the smallest unit of an element that maintains the properties of that element g. a substance made up of atoms of two or more different elements joined by chemical bonds h. a sub ...
... d. a bond formed when atoms share electrons e. a combination of two or more substances that are not chemically combined f. the smallest unit of an element that maintains the properties of that element g. a substance made up of atoms of two or more different elements joined by chemical bonds h. a sub ...
Document
... • In 1808, John Dalton published an atomic theory, stating that all matter is made up of atoms that cannot be created, divided, or destroyed. • This theory also stated that all atoms of a certain element are identical, but they differ from atoms of all other elements. • Every substance is made up of ...
... • In 1808, John Dalton published an atomic theory, stating that all matter is made up of atoms that cannot be created, divided, or destroyed. • This theory also stated that all atoms of a certain element are identical, but they differ from atoms of all other elements. • Every substance is made up of ...
chapter 3 notes
... • Four quantum numbers are needed for each electron and no electrons in an atom can have the same set on QN’s. • The principal QN is is identified by the letter n and gives the main energy level of the electron. • The principal QN can have the values 1,2,3,4,5…… • The second QN is identified by the ...
... • Four quantum numbers are needed for each electron and no electrons in an atom can have the same set on QN’s. • The principal QN is is identified by the letter n and gives the main energy level of the electron. • The principal QN can have the values 1,2,3,4,5…… • The second QN is identified by the ...
Identify the following properties as either - Teach-n-Learn-Chem
... 1. Explain what is wrong with the statement “My friend burned a piece of paper (a hydrocarbon) that had the final exam on it and it disappeared”. (Be sure to use a chemical equation, identify reactants and product(s) and include energy). ANSWER: The paper (CxHy) was burned with oxygen and the atoms ...
... 1. Explain what is wrong with the statement “My friend burned a piece of paper (a hydrocarbon) that had the final exam on it and it disappeared”. (Be sure to use a chemical equation, identify reactants and product(s) and include energy). ANSWER: The paper (CxHy) was burned with oxygen and the atoms ...
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.