Chemistry Common Assessment Quarter One
... b. Atoms of different elements always combine in one-to-one ratios. c. Atoms of the same element are always identical. d. Individual atoms can be seen with a microscope. 3. Why did J. J. Thomson reason that electrons must be a part of the atoms of all elements? a. Cathode rays are negatively-charged ...
... b. Atoms of different elements always combine in one-to-one ratios. c. Atoms of the same element are always identical. d. Individual atoms can be seen with a microscope. 3. Why did J. J. Thomson reason that electrons must be a part of the atoms of all elements? a. Cathode rays are negatively-charged ...
Chemistry Common Assessment Quarter One
... ____ 40. To what category of elements does an element belong if it is a poor conductor of electricity? a. transition elements c. nonmetals b. metalloids d. metals ____ 41. Which of the following is true about the electron configurations of the noble gases? a. The highest occupied s and p sublevels ...
... ____ 40. To what category of elements does an element belong if it is a poor conductor of electricity? a. transition elements c. nonmetals b. metalloids d. metals ____ 41. Which of the following is true about the electron configurations of the noble gases? a. The highest occupied s and p sublevels ...
04 Mass Spectrometer and Isotopes
... are atoms of the same element (same # protons) with a different # of neutrons. Therefore they have different atomic masses. Because isotopes have different atomic masses, this is usually indicated in the name. Example Hydrogen-2 This isotope has a mass of 2 g/mol. The atomic mass of an element i ...
... are atoms of the same element (same # protons) with a different # of neutrons. Therefore they have different atomic masses. Because isotopes have different atomic masses, this is usually indicated in the name. Example Hydrogen-2 This isotope has a mass of 2 g/mol. The atomic mass of an element i ...
Chapter Review Answers
... 15. In what ways are protons and neutrons alike? How are they different? Protons and neutrons are alike because they are both located in the nucleus and have the same mass. They are different because protons have a positive charge and neutrons have no charge. 16. Nitrogen-14 and Nitrogen-15 are isot ...
... 15. In what ways are protons and neutrons alike? How are they different? Protons and neutrons are alike because they are both located in the nucleus and have the same mass. They are different because protons have a positive charge and neutrons have no charge. 16. Nitrogen-14 and Nitrogen-15 are isot ...
Finals Study Guide
... Molar Mass—mass of one mole of a pure substance Mass Number—total number of protons and neutrons in the nucleus of an isotope Nuclear Forces—short-range proton-neutron, proton-proton, and neutron-neutron forces that hold nuclear particles together Law of Conservation of Mass—mass is neither created ...
... Molar Mass—mass of one mole of a pure substance Mass Number—total number of protons and neutrons in the nucleus of an isotope Nuclear Forces—short-range proton-neutron, proton-proton, and neutron-neutron forces that hold nuclear particles together Law of Conservation of Mass—mass is neither created ...
Atomic Structure Worksheet Refer to your periodic table to fill in the
... Complete the following chart. Element/ion Atomic # Mass # Li Ba+2 Al+3 F-1 Br Ru+3 Cr+2 S-2 Si C P+3 Ca+2 C Fe Na+1 ...
... Complete the following chart. Element/ion Atomic # Mass # Li Ba+2 Al+3 F-1 Br Ru+3 Cr+2 S-2 Si C P+3 Ca+2 C Fe Na+1 ...
Atomic Structure and Periodic Table Quick Notes
... If an atom loses an electron, it becomes a Positive Ion If an atom gains an electron, it becomes a Negative Ion Ex: when Na reacts with Cl to form NaCl, the Na atom loses an electron, making it a Positive Ion: Na+ The Cl, which gains the electron, now has more negative particles than positive, b ...
... If an atom loses an electron, it becomes a Positive Ion If an atom gains an electron, it becomes a Negative Ion Ex: when Na reacts with Cl to form NaCl, the Na atom loses an electron, making it a Positive Ion: Na+ The Cl, which gains the electron, now has more negative particles than positive, b ...
Chapter 5: Atomic Structure
... contributed such a small fraction of the atoms mass, they were probably an equal fraction of it size so it was like “Plum Pudding”. • In 1911, Ernest Rutherford and his coworkers performed the Gold Foil Experiment to further study the phenomenon. • Concluded that most of the mass of each atom and al ...
... contributed such a small fraction of the atoms mass, they were probably an equal fraction of it size so it was like “Plum Pudding”. • In 1911, Ernest Rutherford and his coworkers performed the Gold Foil Experiment to further study the phenomenon. • Concluded that most of the mass of each atom and al ...
03.03a Atomic Number, Mass Number, and Isotopes
... both the atomic number of the element (Z) and the mass number (A) of the isotope. The mass number is the total number of protons and neutrons that make up the nucleus of an isotope. For example, carbon-14, commonly used to date biological objects (up to approximately 50,000 years old), has six proto ...
... both the atomic number of the element (Z) and the mass number (A) of the isotope. The mass number is the total number of protons and neutrons that make up the nucleus of an isotope. For example, carbon-14, commonly used to date biological objects (up to approximately 50,000 years old), has six proto ...
3. atomic structure
... An orbit describes a particular path that an object follows as it travels around another object For example, the moon has an orbit about the earth Electrons do not follow a particular path around the nucleus Instead, an orbital describes the areas around the nucleus where an electron is most likely ...
... An orbit describes a particular path that an object follows as it travels around another object For example, the moon has an orbit about the earth Electrons do not follow a particular path around the nucleus Instead, an orbital describes the areas around the nucleus where an electron is most likely ...
Chapter 2: The Composition and Structure of the Atom • 2.1 Matter
... The emission-spectrum of hydrogen leads to the modern understanding of the electronic structure of the atom. 2.5 The Bohr Atom o Initial understanding of the atom by Niels Bohr o Electrons exist in fixed energy levels surrounding the nucleus. The quantization of energy. o Promotion of an electron oc ...
... The emission-spectrum of hydrogen leads to the modern understanding of the electronic structure of the atom. 2.5 The Bohr Atom o Initial understanding of the atom by Niels Bohr o Electrons exist in fixed energy levels surrounding the nucleus. The quantization of energy. o Promotion of an electron oc ...
Chapter 2 Atoms, Molecules and Ions Atomos “uncuttable” Protons +
... 2. Mass of 1 proton ≈ Mass of 1 neutron 3. e- s are MUCH lighter than protons & neutrons 4. Nucleus consists of protons and neutrons only; nuclei contain all of the positive charge and almost all of the mass of the atom 5. Most of an atom’s volume is empty space ...
... 2. Mass of 1 proton ≈ Mass of 1 neutron 3. e- s are MUCH lighter than protons & neutrons 4. Nucleus consists of protons and neutrons only; nuclei contain all of the positive charge and almost all of the mass of the atom 5. Most of an atom’s volume is empty space ...
Name
... Essential Standard 5b: The idea of atoms explains the conservation of matter: in chemical reactions the number of atoms stays the same no matter how they are arranged, so their total mass stays the same. ...
... Essential Standard 5b: The idea of atoms explains the conservation of matter: in chemical reactions the number of atoms stays the same no matter how they are arranged, so their total mass stays the same. ...
Copyright © 2014 Edmentum - All rights reserved. Chemistry Matter
... 2. The atomic radius of lithium (Li) is 1.34 angstroms. What does this distance indicate about an atom of lithium? A. the distance an electron travels around the nucleus in 1 second B. the approximate distance from the nucleus to the outermost electron C. the distance across the nucleus D. the avera ...
... 2. The atomic radius of lithium (Li) is 1.34 angstroms. What does this distance indicate about an atom of lithium? A. the distance an electron travels around the nucleus in 1 second B. the approximate distance from the nucleus to the outermost electron C. the distance across the nucleus D. the avera ...
Chemistry a material science!
... Intensive properties such as density and melting temperature can be used to identify the substance. ...
... Intensive properties such as density and melting temperature can be used to identify the substance. ...
L2 CHEMISTRY MIDTERM REVIEW Name KEY
... Photon is just the name for a quantum of light Electron Transition – when an electron moves from one level to another a. When an electron transitions to a higher energy level, a photon is absorbed. b. When an electron transitions to a lower energy level, a photon is emitted. The emission spectrum of ...
... Photon is just the name for a quantum of light Electron Transition – when an electron moves from one level to another a. When an electron transitions to a higher energy level, a photon is absorbed. b. When an electron transitions to a lower energy level, a photon is emitted. The emission spectrum of ...
Chemical Nomenclature (ionic compounds)
... naming and formulation of compounds. It is universal! The following pages are a programmed approach to the problem of obtaining either the formula or name of a chemical compound. a) The compound will be formed by combining a metal and a non-metal. The metal portion will always appear first in the na ...
... naming and formulation of compounds. It is universal! The following pages are a programmed approach to the problem of obtaining either the formula or name of a chemical compound. a) The compound will be formed by combining a metal and a non-metal. The metal portion will always appear first in the na ...
Dalton Model of the Atom - Teach-n-Learn-Chem
... • Each compound has a specific ratio of elements • It is a ratio by mass • Water is always 8 grams of oxygen for every one gram of hydrogen ...
... • Each compound has a specific ratio of elements • It is a ratio by mass • Water is always 8 grams of oxygen for every one gram of hydrogen ...