FE Exam review for Chemistry
... Rutherford proved that protons & neutrons form a central nucleus, and that electrons surrounded the nucleus in a diffuse cloud. The Bohr or planetary model of the atom? Bohr believed that electrons circled the nucleus only at specific, or principle, energy levels. Like planets orbiting the nucleus, ...
... Rutherford proved that protons & neutrons form a central nucleus, and that electrons surrounded the nucleus in a diffuse cloud. The Bohr or planetary model of the atom? Bohr believed that electrons circled the nucleus only at specific, or principle, energy levels. Like planets orbiting the nucleus, ...
Atoms - Chemistry R: 4(AE)
... • Electrons act like particles (because they have a mass) and waves (because they have certain frequencies corresponding to their energy levels) • Electrons are located in orbitals around the nucleus that correspond to specific energy levels • Electron clouds = orbitals that do not have sharp bounda ...
... • Electrons act like particles (because they have a mass) and waves (because they have certain frequencies corresponding to their energy levels) • Electrons are located in orbitals around the nucleus that correspond to specific energy levels • Electron clouds = orbitals that do not have sharp bounda ...
Atomic Structure Study Guide
... The atomic number of an element equals the number of protons in an atom of that element. Hydrogen atoms are the only atoms with a single proton. No two atoms have the same number of protons. Each positive charge in an atom is balance by a negative charge, because all atoms are neutral. The ...
... The atomic number of an element equals the number of protons in an atom of that element. Hydrogen atoms are the only atoms with a single proton. No two atoms have the same number of protons. Each positive charge in an atom is balance by a negative charge, because all atoms are neutral. The ...
filled in teacher version, level 1 only
... Hans G. and undergraduate Ernest M. worked for Rutherford.) “It was quite the most incredible event that has ever happened to me in my life. It was almost as incredible as if you fired a 15inch shell at a piece of tissue paper and it came back and hit you. On consideration, I realized that this scat ...
... Hans G. and undergraduate Ernest M. worked for Rutherford.) “It was quite the most incredible event that has ever happened to me in my life. It was almost as incredible as if you fired a 15inch shell at a piece of tissue paper and it came back and hit you. On consideration, I realized that this scat ...
KEY - Unit 3 Practice Qs
... b. Describe, in terms of subatomic particles found in the nucleus, one difference between the nuclei of carbon-12 atoms and the nuclei of carbon-13 atoms. The response must include both isotopes. Carbon-13 has one more neutron than carbon-12. 13. The atomic mass of element A is 63.6 atomic mass unit ...
... b. Describe, in terms of subatomic particles found in the nucleus, one difference between the nuclei of carbon-12 atoms and the nuclei of carbon-13 atoms. The response must include both isotopes. Carbon-13 has one more neutron than carbon-12. 13. The atomic mass of element A is 63.6 atomic mass unit ...
Lecture 2 - TCD Chemistry
... Precision Refers to reproducibility or how close the measurements are to each other. Accuracy Refers to how close a measurement is to the real value. Systematic error Values that are either all higher or all lower than the actual value. Random Error In the absence of systematic error, some values th ...
... Precision Refers to reproducibility or how close the measurements are to each other. Accuracy Refers to how close a measurement is to the real value. Systematic error Values that are either all higher or all lower than the actual value. Random Error In the absence of systematic error, some values th ...
Adaptif DALTON ATOMIC THEORY
... 1. Every matter compiled by small particle so-called with atom 2. Atom is a real small solid ball 3. Element is matter which consist of atom that is specific and differs from atom from other element. 4. Compound is matter compiled by two or more atom type with ...
... 1. Every matter compiled by small particle so-called with atom 2. Atom is a real small solid ball 3. Element is matter which consist of atom that is specific and differs from atom from other element. 4. Compound is matter compiled by two or more atom type with ...
Atoms: The Building Blocks of Matter
... • He knew that rays must have come from the atoms of the cathode because most of the atoms in the air had been pumped out of the tube. Because the cathode ray came from the ...
... • He knew that rays must have come from the atoms of the cathode because most of the atoms in the air had been pumped out of the tube. Because the cathode ray came from the ...
Fall Semester Review
... 61. In a molecule of fluorine, the two shared electrons give each fluorine atom how many electron(s) in the outer energy level? 62. The electron configuration of nitrogen is 1s2 2s2 2p 3 . How many more electrons does nitrogen need to satisfy the octet rule? 63. What group of elements satisfies the ...
... 61. In a molecule of fluorine, the two shared electrons give each fluorine atom how many electron(s) in the outer energy level? 62. The electron configuration of nitrogen is 1s2 2s2 2p 3 . How many more electrons does nitrogen need to satisfy the octet rule? 63. What group of elements satisfies the ...
Pure substances
... Classification of Matter: Pure Substances • A pure substance has a fixed composition − Every sample has exactly the same ...
... Classification of Matter: Pure Substances • A pure substance has a fixed composition − Every sample has exactly the same ...
Early Atomic History
... regardless of the metal used for the cathode. 2. The rays traveled from the cathode (- charged) to the anode (+ charged). 3. The rays were attracted to the positive plate of an external electrical field, and repelled by the ...
... regardless of the metal used for the cathode. 2. The rays traveled from the cathode (- charged) to the anode (+ charged). 3. The rays were attracted to the positive plate of an external electrical field, and repelled by the ...
- Orangefield ISD
... Isotopes and Mass Number All atoms of a particular element have the same number of protons and electrons but the number of neutrons in the nucleus can differ. Atoms with the same number of protons but different numbers of neutrons are called isotopes. In nature, most elements are found as mixtures ...
... Isotopes and Mass Number All atoms of a particular element have the same number of protons and electrons but the number of neutrons in the nucleus can differ. Atoms with the same number of protons but different numbers of neutrons are called isotopes. In nature, most elements are found as mixtures ...
A Review of High School Chemistry
... What is the big deal with acids and bases? Again, it is because we are working with water, which, as we will see, has its own chemistry that produces ions like H+ and OH-, and which as everyone knows, are what Arrhenius called acids and bases. Consequently, we will spend a lot of time looking at wha ...
... What is the big deal with acids and bases? Again, it is because we are working with water, which, as we will see, has its own chemistry that produces ions like H+ and OH-, and which as everyone knows, are what Arrhenius called acids and bases. Consequently, we will spend a lot of time looking at wha ...
ConcepTest On Simple Redox Reactions
... Comment to Instructor: Correct answer is 3. HCl. Since the oxidation number of H is decreasing from +1 to 0, it is undergoing reduction. Zn is being oxidized, and HCl is the “agent” that is causing the Zn to be oxidized. #4 indicates that the student is thinking that the Zn+2in ZnCl2 is undergoing r ...
... Comment to Instructor: Correct answer is 3. HCl. Since the oxidation number of H is decreasing from +1 to 0, it is undergoing reduction. Zn is being oxidized, and HCl is the “agent” that is causing the Zn to be oxidized. #4 indicates that the student is thinking that the Zn+2in ZnCl2 is undergoing r ...
elements of chemistry unit
... Once the number and types of shared electrons has been determined, assign each shared electron to the more electronegative element. ELECTRONEGATIVITY An element’s ability to attract electrons is its electronegativity. In general, the halogens and group 16 atoms have the highest electronegativity val ...
... Once the number and types of shared electrons has been determined, assign each shared electron to the more electronegative element. ELECTRONEGATIVITY An element’s ability to attract electrons is its electronegativity. In general, the halogens and group 16 atoms have the highest electronegativity val ...
Chapter 2 1
... Atoms are composed of a nucleus containing protons and neutrons, surrounded by electrons. Protons have a positive charge and electrons have a negative charge – leading to electrostatic attraction between the two particles. Neutrons do not have a charge or are neutral. Neutral atoms have equal numbe ...
... Atoms are composed of a nucleus containing protons and neutrons, surrounded by electrons. Protons have a positive charge and electrons have a negative charge – leading to electrostatic attraction between the two particles. Neutrons do not have a charge or are neutral. Neutral atoms have equal numbe ...
Atoms and atomic structure - FQ-B
... E. Rutherford (1911) discovered the nucleus and provided the basis for the modern atomic structure through his alpha particle scattering experiment. According to Rutherford, the atoms is made of two parts: the nucleus and the extra-nuclear part. His experiments proved that the atom is largely empty ...
... E. Rutherford (1911) discovered the nucleus and provided the basis for the modern atomic structure through his alpha particle scattering experiment. According to Rutherford, the atoms is made of two parts: the nucleus and the extra-nuclear part. His experiments proved that the atom is largely empty ...
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02 Atomic Structure [ppt 1MB]
... I can state that the electrons of an atom are arranged in energy levels I can state that an atom is neutral and explain why ...
... I can state that the electrons of an atom are arranged in energy levels I can state that an atom is neutral and explain why ...
Identify the following properties as either - Teach-n-Learn-Chem
... 34. Why do metals generally have lower ionizations energies than nonmetals? Metals have loosely held valence electrons. Metals want to lose electrons to have a stable octet. It is easier for a metal to lose 1,2, 3, or 4 electrons than gain that number. Metals have low electronegativities and are not ...
... 34. Why do metals generally have lower ionizations energies than nonmetals? Metals have loosely held valence electrons. Metals want to lose electrons to have a stable octet. It is easier for a metal to lose 1,2, 3, or 4 electrons than gain that number. Metals have low electronegativities and are not ...
Unit5C - OCCC.edu
... • The sum of the oxidation numbers of all atoms in any chemical species (ion or neutral compound) is equal to the charge on that chemical species ...
... • The sum of the oxidation numbers of all atoms in any chemical species (ion or neutral compound) is equal to the charge on that chemical species ...