What are atoms? Notes - Riverdale Middle School
... • Isotopes are atoms of the same element that have different numbers of neutrons. • The mass number of an atom is the sum of the number of protons and neutrons in an ...
... • Isotopes are atoms of the same element that have different numbers of neutrons. • The mass number of an atom is the sum of the number of protons and neutrons in an ...
PODCAST 1 Atomic Structure
... (quantisation). At the time scientists knew about radiation being emitted and absorbed by atoms a d Boh s odel suggests that ele t o s ould o e et ee shells if the e e gi e o lost energy in the form of radiation. Due to the fixed nature of the shells the frequency of the wave needed to promote an el ...
... (quantisation). At the time scientists knew about radiation being emitted and absorbed by atoms a d Boh s odel suggests that ele t o s ould o e et ee shells if the e e gi e o lost energy in the form of radiation. Due to the fixed nature of the shells the frequency of the wave needed to promote an el ...
Name: _key Date: ______ Period: Unit 3 – Atomic Structure Review
... 7. What do we call atoms that have gained or lost electrons? ions 8. What do we call atoms of the same element that have different numbers of neutrons? isotopes 9. What are atoms that have different numbers of protons? 10. How many protons, neutron, and electrons does U-234 have? P-92, E-92, N-142 1 ...
... 7. What do we call atoms that have gained or lost electrons? ions 8. What do we call atoms of the same element that have different numbers of neutrons? isotopes 9. What are atoms that have different numbers of protons? 10. How many protons, neutron, and electrons does U-234 have? P-92, E-92, N-142 1 ...
Atomic Structure
... particles called atoms that cannot be subdivided. Atoms of the same element are exactly alike. Atoms of different elements can join to form molecules. ...
... particles called atoms that cannot be subdivided. Atoms of the same element are exactly alike. Atoms of different elements can join to form molecules. ...
Chapter 4 “Atomic Structure” Section 4.1 Defining the Atom
... 2. Atoms of same elements are identical. Atoms from one element are different from atoms of a different element. 3. Atoms of different elements can physically mix together or can be chemically combine to form compounds. 4. Chemical reactions occur when atoms are separated, joined, or rearranged. How ...
... 2. Atoms of same elements are identical. Atoms from one element are different from atoms of a different element. 3. Atoms of different elements can physically mix together or can be chemically combine to form compounds. 4. Chemical reactions occur when atoms are separated, joined, or rearranged. How ...
Chapter 4 Notes
... 1. All matter is made of atoms 2. **All atoms of the same element are identical in mass, volume, and properties. 3. Atoms can’t be created, destroyed, or divided. 4. Atoms combine in small, whole number ratios 5. In chemical reactions, atoms are combined, separated or rearranged, NOT turned into ...
... 1. All matter is made of atoms 2. **All atoms of the same element are identical in mass, volume, and properties. 3. Atoms can’t be created, destroyed, or divided. 4. Atoms combine in small, whole number ratios 5. In chemical reactions, atoms are combined, separated or rearranged, NOT turned into ...
Review Molecule: more than one atom, e.g., O2, H2, CO, H2O
... Not all compounds are molecules because solid compounds have a distinct type of bonding, e.g., NaCl. Chemical transformations involve forming new combinations of atoms in whole-number ratios, e.g., H2O = 2 H : 1 O. Atoms are conserved in chemical and physical transformations. 2 H2 ...
... Not all compounds are molecules because solid compounds have a distinct type of bonding, e.g., NaCl. Chemical transformations involve forming new combinations of atoms in whole-number ratios, e.g., H2O = 2 H : 1 O. Atoms are conserved in chemical and physical transformations. 2 H2 ...
protons and neutrons
... • Location: Where it is on the atom • Charge: Electric charge (positive, negative or neutral) • Mass: how big or small it is ...
... • Location: Where it is on the atom • Charge: Electric charge (positive, negative or neutral) • Mass: how big or small it is ...
UNIT 1: THE ATOM
... Magnesium has an electron configuration of 2-8-2 in the ground state. A configuration 0f 2-7-3 would be in the excited state because the second energy is not completely filed because it holds 8 electrons. 15. Valence electrons are electrons in the outermost energy level. All atoms in the same group ...
... Magnesium has an electron configuration of 2-8-2 in the ground state. A configuration 0f 2-7-3 would be in the excited state because the second energy is not completely filed because it holds 8 electrons. 15. Valence electrons are electrons in the outermost energy level. All atoms in the same group ...
Chapter 4 Notes – Atomic Structure
... surrounded by a lot of empty space. Bohr however, focused on the electrons that moved around the nucleus. The possible energies that electrons in an atom can have are called energy levels. To understand energy levels, picture them as steps in a staircase. As you move up or down the staircase, you ca ...
... surrounded by a lot of empty space. Bohr however, focused on the electrons that moved around the nucleus. The possible energies that electrons in an atom can have are called energy levels. To understand energy levels, picture them as steps in a staircase. As you move up or down the staircase, you ca ...
Atomic Theory Class #5
... The Bohr Model, you should be able to explain how orbits are also energy levels, ground state, excited state, how to become excited, what happens when electrons return to the ground state, maximum number of electrons per orbital (think group 18), Spectra, spectra lines, uses for spectra, problems w ...
... The Bohr Model, you should be able to explain how orbits are also energy levels, ground state, excited state, how to become excited, what happens when electrons return to the ground state, maximum number of electrons per orbital (think group 18), Spectra, spectra lines, uses for spectra, problems w ...
Name - cloudfront.net
... 1. All matter consists of indivisible particles called atoms. 2. Atoms of the same element have the same shape and mass. 3. Atoms cannot be created or destroyed. 4. Atoms of different elements may combine with each other in fixed, simple, whole number ratios to form compound atoms. Which of these po ...
... 1. All matter consists of indivisible particles called atoms. 2. Atoms of the same element have the same shape and mass. 3. Atoms cannot be created or destroyed. 4. Atoms of different elements may combine with each other in fixed, simple, whole number ratios to form compound atoms. Which of these po ...
File - Mr. Walsh`s AP Chemistry
... o Ionic compounds are soluble in water if the sum of all of their attractions to the water molecules is greater than their attraction to each other. A good rule of thumb (though there are exceptions) is that almost all compounds with alkali metal and halogen ions are soluble. Most (but not all) comp ...
... o Ionic compounds are soluble in water if the sum of all of their attractions to the water molecules is greater than their attraction to each other. A good rule of thumb (though there are exceptions) is that almost all compounds with alkali metal and halogen ions are soluble. Most (but not all) comp ...
Lab 5
... 18. Annie Jump Cannon’s spectral classification system was based on these lines. The table on the next page shows some unclassified stellar spectra. Based on the table of classified stellar spectra on the previous page, please classify the unclassified stars. You need not worry about the Arabic nume ...
... 18. Annie Jump Cannon’s spectral classification system was based on these lines. The table on the next page shows some unclassified stellar spectra. Based on the table of classified stellar spectra on the previous page, please classify the unclassified stars. You need not worry about the Arabic nume ...
File
... 1 valence electron Alkaline earth- Group 2A- fairly reactive- have 2 valence electrons Transition elements- Groups 3-12 or 1B-8B, metals, often form colored compounds Lanthanides are elements after lanthanum and many are used to produce colors on our TV screens Actinides- follow actinium. All are ra ...
... 1 valence electron Alkaline earth- Group 2A- fairly reactive- have 2 valence electrons Transition elements- Groups 3-12 or 1B-8B, metals, often form colored compounds Lanthanides are elements after lanthanum and many are used to produce colors on our TV screens Actinides- follow actinium. All are ra ...
Atomic structure
... they fired Helium nuclei at a piece of gold foil which was only a few atoms thick. they found that although most of them passed through. About 1 in 10,000 hit ...
... they fired Helium nuclei at a piece of gold foil which was only a few atoms thick. they found that although most of them passed through. About 1 in 10,000 hit ...
atoms = building blocks
... • Matter- the stuff that makes up everything in the universe • Element- A substance that cannot be broken down into other substances by chemical or physical means ...
... • Matter- the stuff that makes up everything in the universe • Element- A substance that cannot be broken down into other substances by chemical or physical means ...
File
... Almost everyone enjoys the bright colors, noise, and drama of fireworks. The loud noises are caused by a black powder that explodes when burned. What causes the colors? The answer to this question is directly related to energy levels and the strict rules that govern how electrons act around a nucleu ...
... Almost everyone enjoys the bright colors, noise, and drama of fireworks. The loud noises are caused by a black powder that explodes when burned. What causes the colors? The answer to this question is directly related to energy levels and the strict rules that govern how electrons act around a nucleu ...
Chapter 2: Matter is Made up of Atoms
... Electrons in Energy Levels • Atoms are arranged in energy levels (e.l.’s), at different distances from nucleus • Close to nucleus = low energy • Far from nucleus = high energy • e-s in highest occupied level are “valence e-s” • Only so many e-’s can fit in energy levels • e-s fill lower e.l.’s befo ...
... Electrons in Energy Levels • Atoms are arranged in energy levels (e.l.’s), at different distances from nucleus • Close to nucleus = low energy • Far from nucleus = high energy • e-s in highest occupied level are “valence e-s” • Only so many e-’s can fit in energy levels • e-s fill lower e.l.’s befo ...
Standard Atomic Notation Standard Atomic Notation
... • Although they exist, we will not draw elements with more than three orbits. Extra Rules: • You have to put electrons into the lowest orbits first. • Put electrons in the second and third orbits one at a time until you get 4 electrons in the orbit, and then start to pair them up. Draw the Bohr-Ruth ...
... • Although they exist, we will not draw elements with more than three orbits. Extra Rules: • You have to put electrons into the lowest orbits first. • Put electrons in the second and third orbits one at a time until you get 4 electrons in the orbit, and then start to pair them up. Draw the Bohr-Ruth ...
Preview from Notesale.co.uk Page 2 of 10
... The general structure of atoms is described with the help of quantum mechanics. Of these, Bohr’s theory of hydrogen based on Rutherford’s nuclear atom and making use of those ideas of Planck to triggered the discussion of atomic structure. 1. Bohr’s semi classical theory was not general enough to de ...
... The general structure of atoms is described with the help of quantum mechanics. Of these, Bohr’s theory of hydrogen based on Rutherford’s nuclear atom and making use of those ideas of Planck to triggered the discussion of atomic structure. 1. Bohr’s semi classical theory was not general enough to de ...