The Atomic Theory of Matter
... Dalton’s theory explained: Law of constant composition: The relative kinds and numbers of atoms are constant for a given compound. Law of conservation of mass (matter): During a chemical reaction, the total mass before reaction is equal to the total mass after reaction. ...
... Dalton’s theory explained: Law of constant composition: The relative kinds and numbers of atoms are constant for a given compound. Law of conservation of mass (matter): During a chemical reaction, the total mass before reaction is equal to the total mass after reaction. ...
- Elliott Hudson College
... Atoms consist of a central ____________ containing protons and ___________. The nucleus is _______ compared to the size of the whole atom. The nucleus is surrounded by ___________ in energy levels (also called _________). Atoms have no electric charge because they contain the same number of protons ...
... Atoms consist of a central ____________ containing protons and ___________. The nucleus is _______ compared to the size of the whole atom. The nucleus is surrounded by ___________ in energy levels (also called _________). Atoms have no electric charge because they contain the same number of protons ...
Models of the Atom: A Historical perspective
... All matter is made of atoms Atoms of the same element are identical Each element has different atoms Atoms of different elements combine in constant ratios to form compounds. • Atoms are rearranged in reactions. ...
... All matter is made of atoms Atoms of the same element are identical Each element has different atoms Atoms of different elements combine in constant ratios to form compounds. • Atoms are rearranged in reactions. ...
Electron shells
... 1. Read the text and tell me if there are words you do not understand. Amount = quantity Handheld = hold by the hands 2. Questions about the text: (Le cours sur les spectres a déjà été vu en français) How did Niels Bohr explain the lines in atomic spectra? → Lines in atomic spectra should correspond ...
... 1. Read the text and tell me if there are words you do not understand. Amount = quantity Handheld = hold by the hands 2. Questions about the text: (Le cours sur les spectres a déjà été vu en français) How did Niels Bohr explain the lines in atomic spectra? → Lines in atomic spectra should correspond ...
Atomic Theories Timeline
... • There are various basic elements from which all matter is made • Everything is composed of small atoms moving in a void • Some atoms are round, pointy, oily, have hooks, etc. to account for their properties • Ideas rejected by leading philosophers because void = no existence ...
... • There are various basic elements from which all matter is made • Everything is composed of small atoms moving in a void • Some atoms are round, pointy, oily, have hooks, etc. to account for their properties • Ideas rejected by leading philosophers because void = no existence ...
Atomic History
... nucleus could only be located in specific paths called orbitals. This was supported by the line spectra of atoms His model is called the planetary model ...
... nucleus could only be located in specific paths called orbitals. This was supported by the line spectra of atoms His model is called the planetary model ...
Document
... Democritus and the Atom section and explain how the student in figure 3 is illustrating Democritus’s ...
... Democritus and the Atom section and explain how the student in figure 3 is illustrating Democritus’s ...
Chapter 2 Atoms, Elements, Orbitals, and Electron Configurations
... atomic mass of Cu to the correct number of significant figures from the data. [ANS: see periodic chart. (63.5)] ...
... atomic mass of Cu to the correct number of significant figures from the data. [ANS: see periodic chart. (63.5)] ...
Name
... away from a positively charged piece of metal placed outside of the tube. Thompson assumed that there must be negatively charged particles present because an isolated atom has no overall ...
... away from a positively charged piece of metal placed outside of the tube. Thompson assumed that there must be negatively charged particles present because an isolated atom has no overall ...
Honors Chemistry
... 6. How can the number of protons be determined? Neutrons? Electrons? 7. Determine the # of p+, no and e- in the following: oxygen-14, 356210XY34- and Astatine. 8. Draw a wave. Label the wavelength and amplitude on your drawing. 9. What are the colors that make up white light? 10. Give the different ...
... 6. How can the number of protons be determined? Neutrons? Electrons? 7. Determine the # of p+, no and e- in the following: oxygen-14, 356210XY34- and Astatine. 8. Draw a wave. Label the wavelength and amplitude on your drawing. 9. What are the colors that make up white light? 10. Give the different ...
The Periodic Table
... toward NE corner of PT since these atoms have a great affinity (“love and happiness”) for e-. (Think of “Jumping for Joy”!) • What happens down a group? • Decreases; since the electrons are further from the nucleus, the atom has no desire to hang on to it’s electron, so it won’t release too much “Ha ...
... toward NE corner of PT since these atoms have a great affinity (“love and happiness”) for e-. (Think of “Jumping for Joy”!) • What happens down a group? • Decreases; since the electrons are further from the nucleus, the atom has no desire to hang on to it’s electron, so it won’t release too much “Ha ...
Nuclear Chemistry
... • Produces even more energy per gram of fuel than fission. • Produces less nuclear waste than fission. • Fusion fuel is easy to get. (Heavy hydrogen is found in ...
... • Produces even more energy per gram of fuel than fission. • Produces less nuclear waste than fission. • Fusion fuel is easy to get. (Heavy hydrogen is found in ...
Getting to Know: Periodic Table
... element do not have the same number of neutrons. For example, most atoms of the element carbon, C, have 6 neutrons in their nucleus. There are some atoms of carbon that have 7 or even 8 neutrons in their nucleus. Atoms of the same element that have a different number of neutrons are called isotopes. ...
... element do not have the same number of neutrons. For example, most atoms of the element carbon, C, have 6 neutrons in their nucleus. There are some atoms of carbon that have 7 or even 8 neutrons in their nucleus. Atoms of the same element that have a different number of neutrons are called isotopes. ...
Types of Measurement
... Periodic Trend - The atomic radius increases as one moves down the group. The atomic radius decreases as one moves across a period. ...
... Periodic Trend - The atomic radius increases as one moves down the group. The atomic radius decreases as one moves across a period. ...
Atomic number
... decay and thereby lose energy. Why would nucleii tend to fall apart?? (Think about what protons do to each other) These unstable elements are called RADIOACTIVE. All elements with more than 83 protons are RADIOACTIVE. ...
... decay and thereby lose energy. Why would nucleii tend to fall apart?? (Think about what protons do to each other) These unstable elements are called RADIOACTIVE. All elements with more than 83 protons are RADIOACTIVE. ...
Atomic Structure
... atoms of one element are different from the atoms of another element. • 3. Atoms of different elements can physically mix together or can chemically combine in simplewhole number ratios to form compounds. • 4. Chemical reactions occur when atoms are separated, joined or rearranged. ...
... atoms of one element are different from the atoms of another element. • 3. Atoms of different elements can physically mix together or can chemically combine in simplewhole number ratios to form compounds. • 4. Chemical reactions occur when atoms are separated, joined or rearranged. ...
HistoryWebactivityKey
... A physicist named Erwin Schrödinger showed that electrons are really waves. Schrödinger showed that these electrons don't even move. The waves are stationary. Each time you check where an electron is you will find it in a different place, but that doesn't mean it's moving in between checks. For some ...
... A physicist named Erwin Schrödinger showed that electrons are really waves. Schrödinger showed that these electrons don't even move. The waves are stationary. Each time you check where an electron is you will find it in a different place, but that doesn't mean it's moving in between checks. For some ...
Page 201 - ClassZone
... cloud has a certain amount of energy. This energy keeps it moving about the nucleus. The energy keeps the negative electron from falling into the positive nucleus. We also know that electrons with similar amounts of energy are grouped together in shells. Each shell can hold only a certain number of ...
... cloud has a certain amount of energy. This energy keeps it moving about the nucleus. The energy keeps the negative electron from falling into the positive nucleus. We also know that electrons with similar amounts of energy are grouped together in shells. Each shell can hold only a certain number of ...
Physical Science EOCT Review Notes
... Atomic number – number of protons; identifies the element Atomic mass – number of protons plus the number of neutrons in the nucleus of atom (protons + neutrons) ...
... Atomic number – number of protons; identifies the element Atomic mass – number of protons plus the number of neutrons in the nucleus of atom (protons + neutrons) ...
The Atomic Model
... NOT arranged in neat orbits, but can be discussed only by the probability of where they are. (Electron Cloud) ...
... NOT arranged in neat orbits, but can be discussed only by the probability of where they are. (Electron Cloud) ...
Document
... • wave / particle duality of matter (for ex. light: wave / photons, but applies to any object) • Heisenberg uncertainty principle: cannot measure simultaneously the position and momentum of a particle - the greater the precision in one, the less precise the other (uses probabilities) • pairs of part ...
... • wave / particle duality of matter (for ex. light: wave / photons, but applies to any object) • Heisenberg uncertainty principle: cannot measure simultaneously the position and momentum of a particle - the greater the precision in one, the less precise the other (uses probabilities) • pairs of part ...
Name Class Date Skills Worksheet Directed Reading B Section
... c. Positively charged particles that pass close by the nucleus are pushed away by the positive charges in the nucleus. d. The nucleus is made up of protons and electrons. 11. How did Rutherford’s model describe the atom? ______________________________________________________________ ________________ ...
... c. Positively charged particles that pass close by the nucleus are pushed away by the positive charges in the nucleus. d. The nucleus is made up of protons and electrons. 11. How did Rutherford’s model describe the atom? ______________________________________________________________ ________________ ...
Chemistry- History of the Atom Notes Democritus
... 4. Atoms of different elements combine in simple whole number rations to form chemical compounds. 5. In chemical reactions, atoms are combined, separated, or rearranged. ...
... 4. Atoms of different elements combine in simple whole number rations to form chemical compounds. 5. In chemical reactions, atoms are combined, separated, or rearranged. ...
Name
... 2. Highlight the parts of Dalton's atomic theory that were proved to be false in later theories: • All elements are made up of tiny indivisible particles called atoms. • Atoms of the same element are identical. The atoms of one element are different from the atoms of another ...
... 2. Highlight the parts of Dalton's atomic theory that were proved to be false in later theories: • All elements are made up of tiny indivisible particles called atoms. • Atoms of the same element are identical. The atoms of one element are different from the atoms of another ...
Chemistry Study Guide
... Metals- Hard, shiny elements appearing on the left side of the Periodic Table. They are good conductors of heat and electricity. Examples include; iron (Fe), aluminum (Al), and sodium (Na). Metalloids- Appear alon the bolded line on the Periodic Table. They conduct electricity under some conditi ...
... Metals- Hard, shiny elements appearing on the left side of the Periodic Table. They are good conductors of heat and electricity. Examples include; iron (Fe), aluminum (Al), and sodium (Na). Metalloids- Appear alon the bolded line on the Periodic Table. They conduct electricity under some conditi ...