Notes for Unit 2
... From 1898-1907 Ernest Rutherford was doing some work and he shot some positively charged particles through gold foil. Rutherford proposed that atoms were mostly space. At the core was a tiny positive charged center. He called this core the nucleus. The nucleus is only about 1/10,000th the size of an ...
... From 1898-1907 Ernest Rutherford was doing some work and he shot some positively charged particles through gold foil. Rutherford proposed that atoms were mostly space. At the core was a tiny positive charged center. He called this core the nucleus. The nucleus is only about 1/10,000th the size of an ...
Atoms, Molecules and Periodic Table
... 3. Compounds are composed of atoms of more than one element. 4. A chemical reaction involves only the separation, combination, or rearrangement of atoms; it does not result in their creation or destruction. ...
... 3. Compounds are composed of atoms of more than one element. 4. A chemical reaction involves only the separation, combination, or rearrangement of atoms; it does not result in their creation or destruction. ...
IONS and Isotopes PPT
... Find how many protons or electrons in would have as a nuetral atom. Then what ever the charge is (i.e. positive) do the opposite of the charge (subtract) to the electrons only Cl+2 = 17 electrons -2 electrons = 15e ...
... Find how many protons or electrons in would have as a nuetral atom. Then what ever the charge is (i.e. positive) do the opposite of the charge (subtract) to the electrons only Cl+2 = 17 electrons -2 electrons = 15e ...
History of Atomic Models
... Quantum Numbers- each electron has four quantum numbers that give it a specific address within the atom represented by the letters n, l, m and ms. Principal Quantum Number (n)- the principle energy level in which the electron resides. An electron’s “n” is determined by the row of the periodic table ...
... Quantum Numbers- each electron has four quantum numbers that give it a specific address within the atom represented by the letters n, l, m and ms. Principal Quantum Number (n)- the principle energy level in which the electron resides. An electron’s “n” is determined by the row of the periodic table ...
10-1
... of gold does. Atoms are made up of smaller parts but these do not have the same properties as the material it came from. Every atom has a nucleus or center. Inside the nucleus are protons and neutrons. Protons are positively charged. Neutrons have no electrical charge and are neutral. Both of these ...
... of gold does. Atoms are made up of smaller parts but these do not have the same properties as the material it came from. Every atom has a nucleus or center. Inside the nucleus are protons and neutrons. Protons are positively charged. Neutrons have no electrical charge and are neutral. Both of these ...
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 ...
“earth, air, fire and water" matter was composed of small particles
... 3. Reactions occur when atoms are separated from one another, joined, or rearranged, but matter cannot be created or destroyed. This is the Law of Conservation of Mass (Matter). 4. Atoms of different elements can combine in whole number ratios to form compounds a. Law of Definite Proportion-use wat ...
... 3. Reactions occur when atoms are separated from one another, joined, or rearranged, but matter cannot be created or destroyed. This is the Law of Conservation of Mass (Matter). 4. Atoms of different elements can combine in whole number ratios to form compounds a. Law of Definite Proportion-use wat ...
Ch. 3: Atoms History History Law of Conservation of Mass Law of
... contains most of the particles ...
... contains most of the particles ...
CHAPTER 5 NOTES – ELECTRONS IN ATOMS
... Schrödinger equation – determines the allowed energies an electron can have and how likely it is to find the electron in various locations around the nucleus ...
... Schrödinger equation – determines the allowed energies an electron can have and how likely it is to find the electron in various locations around the nucleus ...
Lesson 4 - 5.1: Models of the atom
... However, a small number of alpha particles bounced almost straight back from the gold foil ...
... However, a small number of alpha particles bounced almost straight back from the gold foil ...
Chapter 4 Atoms - LCMR School District
... Chlorine’s atomic number is 17 Average Atomic Mass – the average mass of an element, represents one mole of a that substance, Chlorine has a average atomic mass of 35.453 Mass Number – the average atomic mass rounded to a whole number; represents the number of neutrons and protons in the nucleus of ...
... Chlorine’s atomic number is 17 Average Atomic Mass – the average mass of an element, represents one mole of a that substance, Chlorine has a average atomic mass of 35.453 Mass Number – the average atomic mass rounded to a whole number; represents the number of neutrons and protons in the nucleus of ...
4-2 A Guided Tour of the Periodic Table
... An amu is equal to one-twelfth of the mass of a carbon-12 atom. This isotope of carbon has six protons and six neutrons, so individual protons and neutrons must each have a mass of about 1.0 amu, because electrons contribute very little mass. ...
... An amu is equal to one-twelfth of the mass of a carbon-12 atom. This isotope of carbon has six protons and six neutrons, so individual protons and neutrons must each have a mass of about 1.0 amu, because electrons contribute very little mass. ...
Chemistry
... I. Discovered the atom’s nucleus by shooting Alpha particles into gold foil. J. First to theorize that atoms are small indivisible particles. K. Used the cathode ray tube to ID negative particles which led to the plum pudding model of the atom. L. Theorized that all matter is continuous and not made ...
... I. Discovered the atom’s nucleus by shooting Alpha particles into gold foil. J. First to theorize that atoms are small indivisible particles. K. Used the cathode ray tube to ID negative particles which led to the plum pudding model of the atom. L. Theorized that all matter is continuous and not made ...
The History of the Atom - Brookville Local Schools
... o For a very long time, nobody did any scientific experimentation, so the idea of the atom was left in the realm of pure thought. However, Enlightenment philosophy taught that reason was the only true basis for knowing, so experimentation restarted. o Law of Conservation of Mass (Lavoisier): The wei ...
... o For a very long time, nobody did any scientific experimentation, so the idea of the atom was left in the realm of pure thought. However, Enlightenment philosophy taught that reason was the only true basis for knowing, so experimentation restarted. o Law of Conservation of Mass (Lavoisier): The wei ...
Chemistry
... ability to calculate pH from concentrations of hydroxonium or hydroxide ions will be expected. The use of the pH meter and universal indicator in the measurement of pH. Theory of indicators will not be tested. Students are expected to be familiar with the logarithmic function as required for calcula ...
... ability to calculate pH from concentrations of hydroxonium or hydroxide ions will be expected. The use of the pH meter and universal indicator in the measurement of pH. Theory of indicators will not be tested. Students are expected to be familiar with the logarithmic function as required for calcula ...
ELECTRONS IN THE ATOM
... There are seven “floors” in our building. Each of these “floors” is assigned a number. These are called the principal quantum numbers (n). Principal energy levels are assigned values in order of increasing energy: n = 1, 2, 3, 4, and so forth. ...
... There are seven “floors” in our building. Each of these “floors” is assigned a number. These are called the principal quantum numbers (n). Principal energy levels are assigned values in order of increasing energy: n = 1, 2, 3, 4, and so forth. ...
Physics
... Today, the wavelike properties of beams of electrons are useful in magnifying objects. The electrons in an electron microscope have much smaller wavelengths than visible light. This allows a much clearer enlarged image of a very small object, such as this ...
... Today, the wavelike properties of beams of electrons are useful in magnifying objects. The electrons in an electron microscope have much smaller wavelengths than visible light. This allows a much clearer enlarged image of a very small object, such as this ...
Preview from Notesale.co.uk Page 2 of 12
... usual in the order of their atomic number, from 2 to 20. The red numbers below each chemical symbol show its electronic structure. Moving across each period, you can see that the number of occupie ...
... usual in the order of their atomic number, from 2 to 20. The red numbers below each chemical symbol show its electronic structure. Moving across each period, you can see that the number of occupie ...
What is an ion?
... Just as each state has a two-letter abbreviation, each element has a oneor two-letter symbol to make life simple for chemists. ...
... Just as each state has a two-letter abbreviation, each element has a oneor two-letter symbol to make life simple for chemists. ...
Chapter 2 - Chemistry
... 3.) A compound is a type of matter composed of atoms of two or more elements chemically combined in fixed proportions. 4.) A chemical reaction consists of the rearrangement of the atoms present in the reacting substances to give new chemical combinations present in the substances formed by the react ...
... 3.) A compound is a type of matter composed of atoms of two or more elements chemically combined in fixed proportions. 4.) A chemical reaction consists of the rearrangement of the atoms present in the reacting substances to give new chemical combinations present in the substances formed by the react ...
Acids and Bases B.pps
... Electrons are almost 2000 times smaller than protons and neutrons, so almost all the mass of an atom is concentrated in its nucleus. ...
... Electrons are almost 2000 times smaller than protons and neutrons, so almost all the mass of an atom is concentrated in its nucleus. ...
THE MINISTRY OF HIGHER AND SECONDARY SPECIAL
... characteristics of the elements began to repeat. The success of Mendeleev's table came from two decisions he made: The first was to leave gaps in the table when it seemed that the corresponding element had not yet been discovered. Mendeleev was not the first chemist to do so, but he was the first to ...
... characteristics of the elements began to repeat. The success of Mendeleev's table came from two decisions he made: The first was to leave gaps in the table when it seemed that the corresponding element had not yet been discovered. Mendeleev was not the first chemist to do so, but he was the first to ...
Name: Date: ______ ABC# _____
... 7. Any sample of an element as it occurs in nature is a mixture of different ISOTOPES (atoms with the same number of protons but different numbers of neutrons). More Information (a) The number BELOW THE SYMBOL for each element on the periodic table is called the ...
... 7. Any sample of an element as it occurs in nature is a mixture of different ISOTOPES (atoms with the same number of protons but different numbers of neutrons). More Information (a) The number BELOW THE SYMBOL for each element on the periodic table is called the ...