chapter 11: modern atomic theory
... Werner Heisenberg (1927); Heisenberg Uncertainty Principle – For very small particles (e.g. proton, neutrons, electrons), there is an inherent uncertainty in the particles’ position and motion. → It is impossible to determine both the particle’s position and its momentum. → It is impossible to dete ...
... Werner Heisenberg (1927); Heisenberg Uncertainty Principle – For very small particles (e.g. proton, neutrons, electrons), there is an inherent uncertainty in the particles’ position and motion. → It is impossible to determine both the particle’s position and its momentum. → It is impossible to dete ...
Atomic Theory, Mole Relationships, Percent Compositions, and
... The Structure of Atoms: Protons and Neutrons Atomic Nucleus: When Ernest Rutherford (1871–1937) directed a beam of alpha (α) particles at a thin gold foil, he found that almost all the particles passed through the foil undeflected. A very small number, however (about 1 in every 20,000), were deflec ...
... The Structure of Atoms: Protons and Neutrons Atomic Nucleus: When Ernest Rutherford (1871–1937) directed a beam of alpha (α) particles at a thin gold foil, he found that almost all the particles passed through the foil undeflected. A very small number, however (about 1 in every 20,000), were deflec ...
Atomic Theory - Princeton High School
... Updating Dalton’s Atomic Theory 3 major differences between modern atomic theory & Dalton’s atomic theory: • Atoms are NOT indivisible – they are made up of protons, neutrons, and electrons • Atoms of the same element are NOT exactly alike – they can have different masses (isotopes) • Atoms CAN be ...
... Updating Dalton’s Atomic Theory 3 major differences between modern atomic theory & Dalton’s atomic theory: • Atoms are NOT indivisible – they are made up of protons, neutrons, and electrons • Atoms of the same element are NOT exactly alike – they can have different masses (isotopes) • Atoms CAN be ...
UNIT 1 Atomic Structure
... outer s and p orbitals. This stability comes from the low energy state of this configuration and also accounts for the low reactivity of these elements (most elements react with other elements to get to a lower, more stable energy state). For example the halogens (Group 7A) have 7 valence electrons ...
... outer s and p orbitals. This stability comes from the low energy state of this configuration and also accounts for the low reactivity of these elements (most elements react with other elements to get to a lower, more stable energy state). For example the halogens (Group 7A) have 7 valence electrons ...
Chapter 5
... indestructible particles called atoms. 2) All atoms of an element are identical and have the same properties. 3) Atoms of different elements combine to form compounds. 4) Compounds contain atoms in small whole number ratios. ...
... indestructible particles called atoms. 2) All atoms of an element are identical and have the same properties. 3) Atoms of different elements combine to form compounds. 4) Compounds contain atoms in small whole number ratios. ...
Campbell Biology, 10e (Reece) Chapter 2 The Chemical Context of
... 5) Knowing the atomic mass of an element allows inferences about which of the following? A) the number of electrons in the element B) the number of protons in the element C) the number of protons plus neutrons in the element D) the number of protons plus electrons in the element 6) In what way are ...
... 5) Knowing the atomic mass of an element allows inferences about which of the following? A) the number of electrons in the element B) the number of protons in the element C) the number of protons plus neutrons in the element D) the number of protons plus electrons in the element 6) In what way are ...
Chapter 2
... in a chemical reaction. Elements can only be converted into other elements in nuclear reactions. 3. All atoms of an element have the same number of protons and electrons, which determines the chemical behavior of the element. Isotopes of an element differ in the number of neutrons, and thus in mass ...
... in a chemical reaction. Elements can only be converted into other elements in nuclear reactions. 3. All atoms of an element have the same number of protons and electrons, which determines the chemical behavior of the element. Isotopes of an element differ in the number of neutrons, and thus in mass ...
Electron Configurations
... • Atom contain a dense, positively charged nucleus (Rutherford’s Experiment) • Neutrally charged particles called neutrons are located in nucleus. (prevents coulomb repulsion of protons. • Electrons located outside nucleus; very small mass. • The field of chemistry deals with ELECTRONS and ...
... • Atom contain a dense, positively charged nucleus (Rutherford’s Experiment) • Neutrally charged particles called neutrons are located in nucleus. (prevents coulomb repulsion of protons. • Electrons located outside nucleus; very small mass. • The field of chemistry deals with ELECTRONS and ...
Sub-atomic particles - Southwest High School
... Waves and particles represent complementary aspects of the same phenomenon. In short, wave phenomena such as light can also have the properties of particles, and particle phenomena such as the constituents of atoms can also have the properties of waves. (1925) Cecilia Payne (England, USA), using the ...
... Waves and particles represent complementary aspects of the same phenomenon. In short, wave phenomena such as light can also have the properties of particles, and particle phenomena such as the constituents of atoms can also have the properties of waves. (1925) Cecilia Payne (England, USA), using the ...
Tutorial 3 - Atomic Theory
... -the orbitals form a series of shells (like the layers of an onion). Shells of higher n surround shells of lower n. 2. The Angular Momentum Quantum Number (l) -can be a whole number with values from 0 to n-1 -tells you about the shape of the orbital, i.e. if it is an s, p or d orbital -you can get i ...
... -the orbitals form a series of shells (like the layers of an onion). Shells of higher n surround shells of lower n. 2. The Angular Momentum Quantum Number (l) -can be a whole number with values from 0 to n-1 -tells you about the shape of the orbital, i.e. if it is an s, p or d orbital -you can get i ...
Unit 5 Section 1 Notes Atomic Structure and History of the Atomic
... Both Democritus in the 4th century and later Dalton in the 19th century believed that the atom was the smallest particle and could not be subdivided. We now know that this is NOT TRUE!!!!the atom can be divided into subatomic ...
... Both Democritus in the 4th century and later Dalton in the 19th century believed that the atom was the smallest particle and could not be subdivided. We now know that this is NOT TRUE!!!!the atom can be divided into subatomic ...
Chemical Reactions: Helpful Hints
... reaction. Just look for a change in the oxidation state of any atom in the reaction; if such a change occurs, it is a redox reaction. An important point to remember about oxidations and reductions: they must occur in concert they cannot occur separately. If one chemical loses its electrons (getting ...
... reaction. Just look for a change in the oxidation state of any atom in the reaction; if such a change occurs, it is a redox reaction. An important point to remember about oxidations and reductions: they must occur in concert they cannot occur separately. If one chemical loses its electrons (getting ...
Stoichiometry - Cloudfront.net
... and produced 3.800 g of CO2 and 1.040 g of H2O. Assuming the compound contains only carbon, hydrogen, and oxygen, determine the empirical formula of the unknown compound. 7. A 105.5 mg sample of a white substance is suspected to be cocaine, C 17H21NO4. The substance formed 279.3 mg of CO2 and 66.46 ...
... and produced 3.800 g of CO2 and 1.040 g of H2O. Assuming the compound contains only carbon, hydrogen, and oxygen, determine the empirical formula of the unknown compound. 7. A 105.5 mg sample of a white substance is suspected to be cocaine, C 17H21NO4. The substance formed 279.3 mg of CO2 and 66.46 ...
Investigating Atoms and Atomic Theory
... electrons do not move about an atom in a definite path, like the planets around the sun. ...
... electrons do not move about an atom in a definite path, like the planets around the sun. ...
File - Rogers` Honors Chemistry
... Harvey Fletcher used the oil-drop experiment to measure the charge of the electron (as well as the electron mass, and Avogadro’s number, since their relation to the electron charge was known). Millikan showed that the results could be explained as integer multiples of a common value (1.592 × 10−19 c ...
... Harvey Fletcher used the oil-drop experiment to measure the charge of the electron (as well as the electron mass, and Avogadro’s number, since their relation to the electron charge was known). Millikan showed that the results could be explained as integer multiples of a common value (1.592 × 10−19 c ...
Chemical Change
... of only one type of atom. – Cannot be chemically broken down to any other substances. – Are represented by chemical symbols on periodic table. – More than 100 elements are known, about 25 are found in living organisms. 6 most abundant include: O, C, H, N, P, S ...
... of only one type of atom. – Cannot be chemically broken down to any other substances. – Are represented by chemical symbols on periodic table. – More than 100 elements are known, about 25 are found in living organisms. 6 most abundant include: O, C, H, N, P, S ...
CHM 103 Lecture 5 S07
... Can also deliver a radiation dose with an internal administration of selected isotopes I-131 targets thyroid cancer - thyroxine ...
... Can also deliver a radiation dose with an internal administration of selected isotopes I-131 targets thyroid cancer - thyroxine ...
Topic 3 - Holy Cross Collegiate
... and Rutherford pictured the atom like a miniature solar system. Electrons rotated around the nucleus like planets rotating around the Sun. Although this model described hydrogen atoms, it was not useful in describing many of the atom’s properties, so Bohr refined the model. He suggested that electron ...
... and Rutherford pictured the atom like a miniature solar system. Electrons rotated around the nucleus like planets rotating around the Sun. Although this model described hydrogen atoms, it was not useful in describing many of the atom’s properties, so Bohr refined the model. He suggested that electron ...
4.1 Studying the structure of ______ is a little like studying wind
... As did Rutherford's atomic model, Bohr’s atomic model had a _____________ surrounded by a large volume of space. But Bohr’s model focused on the __________________________________________. In Bohr’s model, electrons move with constant speed in fixed orbits around the nucleus, like planets around a s ...
... As did Rutherford's atomic model, Bohr’s atomic model had a _____________ surrounded by a large volume of space. But Bohr’s model focused on the __________________________________________. In Bohr’s model, electrons move with constant speed in fixed orbits around the nucleus, like planets around a s ...
CH 3 power point atomic structure
... ends exactly with a d4 it is an exception to the rule. Thus, Cr should be [Ar] 4s1 3d5. Procedure: Find the closest s orbital. Steal one electron from it, and add it to the d. ...
... ends exactly with a d4 it is an exception to the rule. Thus, Cr should be [Ar] 4s1 3d5. Procedure: Find the closest s orbital. Steal one electron from it, and add it to the d. ...
6.7 Explaining the Periodic Table
... You learned in Section 6.1 that elements are the building blocks of substances. You also learned that pure substances differ because they consist of different elements. You know from Dalton’s atomic theory that the atoms of each element are different from the atoms of all other elements. What makes ...
... You learned in Section 6.1 that elements are the building blocks of substances. You also learned that pure substances differ because they consist of different elements. You know from Dalton’s atomic theory that the atoms of each element are different from the atoms of all other elements. What makes ...
labeling electrons in atoms
... 3. Since nature likes being in the lowest energy state possible, the atom will return to the ground state. The electron will return to the n = 1 orbit and in the process emit a photon of energy. 4. Since only certain atomic energies are possible, only certain frequencies of electromagnetic radiation ...
... 3. Since nature likes being in the lowest energy state possible, the atom will return to the ground state. The electron will return to the n = 1 orbit and in the process emit a photon of energy. 4. Since only certain atomic energies are possible, only certain frequencies of electromagnetic radiation ...
PowerPoint Template
... particle in the nucleus and that particle is uncharged. It was not until 1932 that J. Chadwick discovered neutron from the shooting of beryllium using alpha particles and this neutron is, then, known as the paricle which has mass of approximately 1,6 x 10-27 kg PROTON NEUTRON ELECTRON ...
... particle in the nucleus and that particle is uncharged. It was not until 1932 that J. Chadwick discovered neutron from the shooting of beryllium using alpha particles and this neutron is, then, known as the paricle which has mass of approximately 1,6 x 10-27 kg PROTON NEUTRON ELECTRON ...
Can Studying the Properties of Light Help Us Study Stars
... of an element. The atomic number tells us how many protons an atom has. For example, hydrogen has an atomic number of one - which means it has one proton, and thus one electron - and actually has no neutrons. The atomic mass is the sum of neutrons and protons in the atom. For example, if an atom had ...
... of an element. The atomic number tells us how many protons an atom has. For example, hydrogen has an atomic number of one - which means it has one proton, and thus one electron - and actually has no neutrons. The atomic mass is the sum of neutrons and protons in the atom. For example, if an atom had ...
Earth Science – Terms and Definitions G1
... Anything that takes up space and has mass. The smallest complete part of an element with all the properties of that element. A substance that contains only one kind of atom, designated by its atomic number A substance made up of two or more elements joined together in fixed proportions. Atoms of ele ...
... Anything that takes up space and has mass. The smallest complete part of an element with all the properties of that element. A substance that contains only one kind of atom, designated by its atomic number A substance made up of two or more elements joined together in fixed proportions. Atoms of ele ...