Prentice Hall Physical Science CH 4 Notes.doc
... •Bohr said that electrons move with constant speed in fixed orbits (energy levels) around the nucleus •each electron in an atom has a specific amount of energy which is equal to the energy of one of the energy levels in the atom •an electron must be in an energy level, it cannot be between •energy l ...
... •Bohr said that electrons move with constant speed in fixed orbits (energy levels) around the nucleus •each electron in an atom has a specific amount of energy which is equal to the energy of one of the energy levels in the atom •an electron must be in an energy level, it cannot be between •energy l ...
The Periodic Table of Elements and Atom Types
... a. Electrons are arranged in energy levels. i. Each energy level can hold only a specific number of electrons ii. Electrons start at the energy level closest to the nucleus and fill up one energy level after another. b. valence electron – an electron in the outermost energy level of an atom ...
... a. Electrons are arranged in energy levels. i. Each energy level can hold only a specific number of electrons ii. Electrons start at the energy level closest to the nucleus and fill up one energy level after another. b. valence electron – an electron in the outermost energy level of an atom ...
Matter - Moodle
... A half-life is the amount of time it takes for ___________ of the amount to decay. It is __________________ ...
... A half-life is the amount of time it takes for ___________ of the amount to decay. It is __________________ ...
5 - BrainMass
... 5.72) Using the values from Thermodynamics Quantities for Selected Substances at 298.15 K (25°C), calculate the value of ΔH° for each of the following reactions: a. N2O4 (g) + 4 H2 (g) N2 (g) + 4 H2O (g) b. 2 KOH(s) + CO2 (g) K2CO3(s) + H2O (g) c. SO2 (g) + 2 H2S (g) 3/8 S8(s) + 2 H2O (g) d. F ...
... 5.72) Using the values from Thermodynamics Quantities for Selected Substances at 298.15 K (25°C), calculate the value of ΔH° for each of the following reactions: a. N2O4 (g) + 4 H2 (g) N2 (g) + 4 H2O (g) b. 2 KOH(s) + CO2 (g) K2CO3(s) + H2O (g) c. SO2 (g) + 2 H2S (g) 3/8 S8(s) + 2 H2O (g) d. F ...
WARM UP: - mssarnelli
... Changing the number of protons results in a ________________________. For example: - one proton = ___________ ...
... Changing the number of protons results in a ________________________. For example: - one proton = ___________ ...
Atomic Structure PPT
... configurations so different levels of bonding 2) Valence electrons are the electrons in the outer most shell. 3) Valence electrons are important because they affect how the element reacts with other elements. ...
... configurations so different levels of bonding 2) Valence electrons are the electrons in the outer most shell. 3) Valence electrons are important because they affect how the element reacts with other elements. ...
03.03a Atomic Number, Mass Number, and Isotopes
... ATOMS: All atoms of the same element have the same number of protons: the number of protons determines the identity of the atom. For example, a carbon atom always has six protons. If it has seven protons, it’s nitrogen, not carbon. The number of protons is called the atomic number (Z). ISOTOPES: Alt ...
... ATOMS: All atoms of the same element have the same number of protons: the number of protons determines the identity of the atom. For example, a carbon atom always has six protons. If it has seven protons, it’s nitrogen, not carbon. The number of protons is called the atomic number (Z). ISOTOPES: Alt ...
Atoms - 8th Grade Science
... Electrons - Subatomic particle found in the an area called Energy levels. This is also known as “The Electron Cloud.” Negative charge. The # of protons is the same as the # of electrons. The mass of a proton & neutron is 1 amu. The mass of an electron is almost zero. ...
... Electrons - Subatomic particle found in the an area called Energy levels. This is also known as “The Electron Cloud.” Negative charge. The # of protons is the same as the # of electrons. The mass of a proton & neutron is 1 amu. The mass of an electron is almost zero. ...
Section 4.2 The Structure of an Atom
... b. number of protons c. number of neutrons d. number of electrons 9. Is the following sentence true or false? Two different elements can false have the same atomic number. 10. What is the mass number of an atom? The mass number of an atom is the sum of the protons and neutrons in the nucleus of that ...
... b. number of protons c. number of neutrons d. number of electrons 9. Is the following sentence true or false? Two different elements can false have the same atomic number. 10. What is the mass number of an atom? The mass number of an atom is the sum of the protons and neutrons in the nucleus of that ...
ppt
... Most of the mass of an atom is in the nucleus, but the actual atomic mass is not exactly the sum of the masses of the nucleons (p + n). ● The electrons do have a small mass. ● Some mass is gained/lost in the energy binding ...
... Most of the mass of an atom is in the nucleus, but the actual atomic mass is not exactly the sum of the masses of the nucleons (p + n). ● The electrons do have a small mass. ● Some mass is gained/lost in the energy binding ...
Matter: A) Homogeneous Matter • Uniform and in 1 phase • Even
... Rutherford: Gold foil experiment with alpha particles (positive) bombarding a piece of gold. Most of them went through the foil, but some were deflected. Shows that the atom is mostly empty space and has a small, positive, dense center (nucleus). It disproved Thomson. Also discovered alpha, beta, an ...
... Rutherford: Gold foil experiment with alpha particles (positive) bombarding a piece of gold. Most of them went through the foil, but some were deflected. Shows that the atom is mostly empty space and has a small, positive, dense center (nucleus). It disproved Thomson. Also discovered alpha, beta, an ...
Lesson 1: Alchemy and Atomic Models
... Suppose we take a small cube of the element lead and cut it into smaller and smaller pieces. As the soft grey metallic pieces get smaller and smaller they still retain the properties of lead. Eventually we would reach a point when the particle of lead could no longer be divided and still retain its ...
... Suppose we take a small cube of the element lead and cut it into smaller and smaller pieces. As the soft grey metallic pieces get smaller and smaller they still retain the properties of lead. Eventually we would reach a point when the particle of lead could no longer be divided and still retain its ...
Ch. 3.2 Atomic Structure
... A similar attraction exists when neutrons are very close to each other or when protons and neutrons are very close together. The short-range proton-neutron, protonproton, and neutron-neutron forces that hold the nuclear particles together are referred to as nuclear forces. ...
... A similar attraction exists when neutrons are very close to each other or when protons and neutrons are very close together. The short-range proton-neutron, protonproton, and neutron-neutron forces that hold the nuclear particles together are referred to as nuclear forces. ...
Chapter 5 Chem classnotes
... Group 17 (halogens) are the most reactive of the nonmetals because? What does the periodic law state? ...
... Group 17 (halogens) are the most reactive of the nonmetals because? What does the periodic law state? ...
Physical Science 1st Semester final Review
... 16. In the graph below, what is the responding (dependent) variable? alculateCalculate the slope of the line shown in the graph. SHOW all work, including the two points you use for your calculation & UNITS!!!! ...
... 16. In the graph below, what is the responding (dependent) variable? alculateCalculate the slope of the line shown in the graph. SHOW all work, including the two points you use for your calculation & UNITS!!!! ...
“Periodic Properties of the Element: Trends in the Periodic Table” By
... The properties of the elements exhibit trends. These trends can be predicted using the periodic table and can be explained and understood by analyzing the electron configurations of the elements. Elements tend to gain or lose valence electrons to achieve stable octet formation. Stable octets are see ...
... The properties of the elements exhibit trends. These trends can be predicted using the periodic table and can be explained and understood by analyzing the electron configurations of the elements. Elements tend to gain or lose valence electrons to achieve stable octet formation. Stable octets are see ...
9.3 Atoms and Elements notes
... number of electrons in an atom = number of protons Electrons are arranged in energy levels (also known as shells) around the nucleus. The lowest energy levels are always filled first. These are closer to the nucleus and hold the least numbers of electrons. The first energy level can only hold 2 el ...
... number of electrons in an atom = number of protons Electrons are arranged in energy levels (also known as shells) around the nucleus. The lowest energy levels are always filled first. These are closer to the nucleus and hold the least numbers of electrons. The first energy level can only hold 2 el ...
Elements Elements (cont.) Elements (cont.)
... • Atoms of a given element are different from those of any other element. – C Carbon b atoms have h different diff chemical h i l andd physical h i l properties than sulfur atoms. ...
... • Atoms of a given element are different from those of any other element. – C Carbon b atoms have h different diff chemical h i l andd physical h i l properties than sulfur atoms. ...
Periodic Trends Homework 1. Rank the following elements from
... 1. Rank the following elements from smallest to largest: N, Sb, Ar. N, Ar, Sb 2. Given any two elements within a group, is the element with the larger atomic number likely to have a larger or smaller radius? larger, the larger the atomic number in a group means more core electrons which increase the ...
... 1. Rank the following elements from smallest to largest: N, Sb, Ar. N, Ar, Sb 2. Given any two elements within a group, is the element with the larger atomic number likely to have a larger or smaller radius? larger, the larger the atomic number in a group means more core electrons which increase the ...
Chapter 2 Matter is Made up of Atoms
... – Because most of the particles passed through the foil, they concluded that the atom is nearly all empty space. – Because a few particles were deflected, they proposed that the atom has a small, dense, positively charged central core, called a nucleus. ...
... – Because most of the particles passed through the foil, they concluded that the atom is nearly all empty space. – Because a few particles were deflected, they proposed that the atom has a small, dense, positively charged central core, called a nucleus. ...
Chapter 10 PowerPoint
... levels if energy is added (heat). According to Bohr, electrons will remain at lowest energy level until enough energy is added. Bohr did a lot of experiments with light. ...
... levels if energy is added (heat). According to Bohr, electrons will remain at lowest energy level until enough energy is added. Bohr did a lot of experiments with light. ...
atoms and elements
... An atom is the smallest particle into which an element can be divided and still maintain the properties of that element. All elements are made of atoms. So what’s an element? What makes one element different from another? Let’s find out! Vocabulary: First things first, let’s look at the structure of ...
... An atom is the smallest particle into which an element can be divided and still maintain the properties of that element. All elements are made of atoms. So what’s an element? What makes one element different from another? Let’s find out! Vocabulary: First things first, let’s look at the structure of ...
1H Atomic Theory Quiz Review
... What is an isotope? How is an element’s mass number different from its atomic mass? Write the Isotope notation for an element with the atomic number 6 and a mass number of 14. How many neutrons does this isotope have? ...
... What is an isotope? How is an element’s mass number different from its atomic mass? Write the Isotope notation for an element with the atomic number 6 and a mass number of 14. How many neutrons does this isotope have? ...