Chapter 4 Section 4.3
... • So instead, we compare the relative masses of atoms using a reference isotope as a standard. • The reference isotope chosen is carbon-12. • The isotope of carbon has been assigned a mass of exactly 12 atomic mass units. ...
... • So instead, we compare the relative masses of atoms using a reference isotope as a standard. • The reference isotope chosen is carbon-12. • The isotope of carbon has been assigned a mass of exactly 12 atomic mass units. ...
mass
... • other evidence for the proton came from the electric charges and masses of nuclei which change by whole units from element to element. • these new positive particles in the nucleus were found to be quite heavy (about 2000 times the mass of the e-). • However, the total mass of most atoms did not ...
... • other evidence for the proton came from the electric charges and masses of nuclei which change by whole units from element to element. • these new positive particles in the nucleus were found to be quite heavy (about 2000 times the mass of the e-). • However, the total mass of most atoms did not ...
Lecture 12 pdf
... The elements • Atoms make up all the matter around us, but there are only 118 distinct types of atoms (to date). These are called elements. • The elements combine in an infinite # of different ways in order to yield huge variety of substances. • Actually, only 88 of the 118 discovered, are found na ...
... The elements • Atoms make up all the matter around us, but there are only 118 distinct types of atoms (to date). These are called elements. • The elements combine in an infinite # of different ways in order to yield huge variety of substances. • Actually, only 88 of the 118 discovered, are found na ...
mack atoms - McClymonds Chemistry
... 1. Most of the atom’s mass and all of its positive charge are contained in a small core called the nucleus. 2. Most of the volume of the atom is empty space through which the tiny, negatively charged electrons are dispersed. 3. The number of negatively charged electrons outside the nucleus is equal ...
... 1. Most of the atom’s mass and all of its positive charge are contained in a small core called the nucleus. 2. Most of the volume of the atom is empty space through which the tiny, negatively charged electrons are dispersed. 3. The number of negatively charged electrons outside the nucleus is equal ...
Atomic masses are weighted averages.
... What we know now of Dalton’s Atomic Theory 1. All elements are composed of tiny indivisible particles called atoms. Atoms are not indivisible – they are made of subatomic particles 2. Atoms of the same element are identical. The atoms of any one element are different from those of any other element ...
... What we know now of Dalton’s Atomic Theory 1. All elements are composed of tiny indivisible particles called atoms. Atoms are not indivisible – they are made of subatomic particles 2. Atoms of the same element are identical. The atoms of any one element are different from those of any other element ...
Chapter 2 Atoms and Elements
... periodically put elements with similar properties in the same column used pattern to predict properties of undiscovered elements where atomic mass order did not fit other properties, he reordered by other properties ◦ Te & I ...
... periodically put elements with similar properties in the same column used pattern to predict properties of undiscovered elements where atomic mass order did not fit other properties, he reordered by other properties ◦ Te & I ...
Chemistry Midterm Review 2006
... us to observe flame tests? Is energy released or absorbed when an electron falls from a higher energy level to a lower energy level? 8. What is the difference between a ground state and an excited state? 9. What is the lowest energy level? The lowest sublevel? 10. What is the maximum number of elect ...
... us to observe flame tests? Is energy released or absorbed when an electron falls from a higher energy level to a lower energy level? 8. What is the difference between a ground state and an excited state? 9. What is the lowest energy level? The lowest sublevel? 10. What is the maximum number of elect ...
Chapter 16 - Structure of an Atom - from class 4/13/15
... • Homework for the week is on the board. • You will need your binder open and ready to take notes today – there will also be a worksheet to take notes on as well • Blue students will be joining us so it is important to not talk, stay focused and get the information you need today. Oh and squeeze in ...
... • Homework for the week is on the board. • You will need your binder open and ready to take notes today – there will also be a worksheet to take notes on as well • Blue students will be joining us so it is important to not talk, stay focused and get the information you need today. Oh and squeeze in ...
Atomic Structure
... The atoms of any particular element always have the same number of protons. For example: hydrogen atoms always contain 1 proton carbon atoms always contain 6 protons magnesium atoms always contain 12 protons. ...
... The atoms of any particular element always have the same number of protons. For example: hydrogen atoms always contain 1 proton carbon atoms always contain 6 protons magnesium atoms always contain 12 protons. ...
Do Now - Montville.net
... Chemically and physically different from the elements that make them up. Must be broken down CHEMICALLY, not ...
... Chemically and physically different from the elements that make them up. Must be broken down CHEMICALLY, not ...
Lecture 21 revised (Slides) October 12
... subshells (with 5 orbitals) are being filled. For the first series of transition metals the 4s and 3d subshells have similar energies and surprises are seen for their electronic configurations. Cr and Cu do not have the “expected” electron configurations. Copyright © 2011 Pearson Canada Inc. ...
... subshells (with 5 orbitals) are being filled. For the first series of transition metals the 4s and 3d subshells have similar energies and surprises are seen for their electronic configurations. Cr and Cu do not have the “expected” electron configurations. Copyright © 2011 Pearson Canada Inc. ...
Atoms Review worksheet
... ______10. What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common? A. They each identified new elements. B. They each identified new isotopes of atoms. C. They each contributed to the development of the atomic theory. D. They each conducted experiments in which particles collid ...
... ______10. What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common? A. They each identified new elements. B. They each identified new isotopes of atoms. C. They each contributed to the development of the atomic theory. D. They each conducted experiments in which particles collid ...
ELECTRONS IN ATOMS
... ________________ of orbitals of different energies. At most there can be only 2 electrons per orbital, and they must have __________________ “spins.” Hund’s rule states that when electrons occupy orbitals of equal energy, they don’t _________ up with an electron of opposite spin until they have to. ...
... ________________ of orbitals of different energies. At most there can be only 2 electrons per orbital, and they must have __________________ “spins.” Hund’s rule states that when electrons occupy orbitals of equal energy, they don’t _________ up with an electron of opposite spin until they have to. ...
Chapter 2 - My Teacher Site
... • Atoms with incomplete valence shells can interact with other atoms in such a way that completes their valence shell, either by: • Sharing valence electrons • Transferring valence electrons • These interactions usually result in atoms staying close together, held by attractions called chemical bon ...
... • Atoms with incomplete valence shells can interact with other atoms in such a way that completes their valence shell, either by: • Sharing valence electrons • Transferring valence electrons • These interactions usually result in atoms staying close together, held by attractions called chemical bon ...
Atoms! - Holtmeyerhouse
... Neutrons have no force, so they do not repel, they are like the glue helping hold together. When get too many protons ( above 83) not enough neutrons to hold. So all elements above 83 are radioactive. (state some) Also isotopes of stable atoms that have too many neutrons makes an atom unstable! ...
... Neutrons have no force, so they do not repel, they are like the glue helping hold together. When get too many protons ( above 83) not enough neutrons to hold. So all elements above 83 are radioactive. (state some) Also isotopes of stable atoms that have too many neutrons makes an atom unstable! ...
Ch 6.7 - Explaining the Atom
... - As you go down each family, the number of electron shells increase by one. Each row increases by one orbit. - Elements in the same family have the same number of electrons in their outer shell. - Elements found in the same family undergo similar chemical reactions, because they have the same numbe ...
... - As you go down each family, the number of electron shells increase by one. Each row increases by one orbit. - Elements in the same family have the same number of electrons in their outer shell. - Elements found in the same family undergo similar chemical reactions, because they have the same numbe ...
An Overview of Chemistry Lecture 3 Lecture 3
... Matter can be classified into three types, based on their atomic makeup: Elements • Matter composed of only one type of atom. Compounds • Matter composed two or more different elements that are chemically bound together and do not vary in composition Mixtures • Matter composed two or more different ...
... Matter can be classified into three types, based on their atomic makeup: Elements • Matter composed of only one type of atom. Compounds • Matter composed two or more different elements that are chemically bound together and do not vary in composition Mixtures • Matter composed two or more different ...
Atomic Structure and Isotopes
... > Atoms of the same elements are the same. > Atoms of different elements can combine together to make compounds. > Chemical reactions occur when atoms are separated, joined, or rearranged. ...
... > Atoms of the same elements are the same. > Atoms of different elements can combine together to make compounds. > Chemical reactions occur when atoms are separated, joined, or rearranged. ...
Net Ionic Equations
... track of electron shifts in chemical reactions. It is defined as “the charge which an atom appears to have when the net electric charge on a chemical species is apportioned according to certain rules”. Important because: the binding of atoms results from the transfer or sharing of electrons. ...
... track of electron shifts in chemical reactions. It is defined as “the charge which an atom appears to have when the net electric charge on a chemical species is apportioned according to certain rules”. Important because: the binding of atoms results from the transfer or sharing of electrons. ...
Balancing reaction equations, oxidation state, and reduction
... track of electron shifts in chemical reactions. It is defined as “the charge which an atom appears to have when the net electric charge on a chemical species is apportioned according to certain rules”. Important because: the binding of atoms results from the transfer or sharing of electrons. ...
... track of electron shifts in chemical reactions. It is defined as “the charge which an atom appears to have when the net electric charge on a chemical species is apportioned according to certain rules”. Important because: the binding of atoms results from the transfer or sharing of electrons. ...
