Atoms
... a. Physical and chemical properties of a compound are usually very different from the elements from which it is formed. b. Examples: 2 gases (H & O) combine to form liquid water Na is an explosive metal while Cl is a poisonous gas. These combine to form NaCl which is a white solid that is not poison ...
... a. Physical and chemical properties of a compound are usually very different from the elements from which it is formed. b. Examples: 2 gases (H & O) combine to form liquid water Na is an explosive metal while Cl is a poisonous gas. These combine to form NaCl which is a white solid that is not poison ...
Name Test Review Chemistry Unit 2: The Atom 1. Fill in the blank
... 7. What is the mass of 0.44 moles of carbon? 8. How many atoms does 43.25 g of iron contain? 9. If a student weighs out 2.01 g of silicon, how many moles is that? 10. How many moles are there in 2.4010 x 1025 particles of gold? 11. What is the mass of a block of aluminum that has a volume of 22.4 cm ...
... 7. What is the mass of 0.44 moles of carbon? 8. How many atoms does 43.25 g of iron contain? 9. If a student weighs out 2.01 g of silicon, how many moles is that? 10. How many moles are there in 2.4010 x 1025 particles of gold? 11. What is the mass of a block of aluminum that has a volume of 22.4 cm ...
Ch 3 studentElements Ions Isotopes
... 2. all atoms of a particular element are identical 3. different elements have different atoms 4. atoms combine in certain whole-number ratios 5. In a chemical reaction, atoms are merely rearranged to form new compounds; they are not created, destroyed, or changed into atoms of any other elements ...
... 2. all atoms of a particular element are identical 3. different elements have different atoms 4. atoms combine in certain whole-number ratios 5. In a chemical reaction, atoms are merely rearranged to form new compounds; they are not created, destroyed, or changed into atoms of any other elements ...
Lesson 13 - Highline Public Schools
... Atoms of the same element that have different numbers of neutrons are called isotopes. The percentage of each isotope of an element that occurs in nature is called the natural percent abundance of the isotope. ...
... Atoms of the same element that have different numbers of neutrons are called isotopes. The percentage of each isotope of an element that occurs in nature is called the natural percent abundance of the isotope. ...
Document
... a) an element which has 5 electrons in each atom b) an element which has 5 electrons in its outer energy level c) an element for which the second energy level is completely filled d) an element which forms ions by gaining only one electron e) how many elements are there in the sixth period? f) the e ...
... a) an element which has 5 electrons in each atom b) an element which has 5 electrons in its outer energy level c) an element for which the second energy level is completely filled d) an element which forms ions by gaining only one electron e) how many elements are there in the sixth period? f) the e ...
Section 5.3
... “forced” to gain an electron by the addition of energy: • A + e - + E → A• The energy value is positive. Such ions are unstable, and will lose the electron spontaneously. ...
... “forced” to gain an electron by the addition of energy: • A + e - + E → A• The energy value is positive. Such ions are unstable, and will lose the electron spontaneously. ...
What does the Periodic Table tell us?
... Any element with an atomic number greater than ____ is man-made (created in a lab) Why is there usually a decimal place in the atomic mass number? It is due to _________________________ Isotopes – atoms of the same element with the same # of ____________ but a different # of _____________ th ...
... Any element with an atomic number greater than ____ is man-made (created in a lab) Why is there usually a decimal place in the atomic mass number? It is due to _________________________ Isotopes – atoms of the same element with the same # of ____________ but a different # of _____________ th ...
Chapter 18 section 1
... Conservation of Mass Investigated combustion and cellular respiration in terms of energy and mass ...
... Conservation of Mass Investigated combustion and cellular respiration in terms of energy and mass ...
The History of the Modern Periodic Table
... (atomic number) of the elements*. He rearranged the elements in order of increasing atomic number. *“There is in the atom a fundamental quantity which increases by regular steps as we pass from each element to the next. This quantity can only be the charge on the central positive nucleus.” ...
... (atomic number) of the elements*. He rearranged the elements in order of increasing atomic number. *“There is in the atom a fundamental quantity which increases by regular steps as we pass from each element to the next. This quantity can only be the charge on the central positive nucleus.” ...
Name Test Review Chapters 4 and 25 Honors Chemistry 1. Fill in
... 11. What is the mass of a block of aluminum that has a volume of 22.4 cm3? (Density of Al = 2.70 g/cm3) 12. If a metal cylinder of copper (density = 8.9 g/cm3) has a mass of 45.4 grams, what is the volume of the cylinder? What is the cylinder’s diameter if it is 1.2 cm in height? 13. Convert 2950 m ...
... 11. What is the mass of a block of aluminum that has a volume of 22.4 cm3? (Density of Al = 2.70 g/cm3) 12. If a metal cylinder of copper (density = 8.9 g/cm3) has a mass of 45.4 grams, what is the volume of the cylinder? What is the cylinder’s diameter if it is 1.2 cm in height? 13. Convert 2950 m ...
Key Concepts - Chemistry Classes of Professor Alba
... proportions led John Dalton to reformulate the atomic theory with the following postulates: (1) each element is composed of indestructible particles called atoms; (2) all atoms of a given element have the same mass and other properties; (3) atoms combine in simple, whole-number ratios to form compou ...
... proportions led John Dalton to reformulate the atomic theory with the following postulates: (1) each element is composed of indestructible particles called atoms; (2) all atoms of a given element have the same mass and other properties; (3) atoms combine in simple, whole-number ratios to form compou ...
Atom Models - Democritus, Dalton, Thompson, Rutherford, Bohr
... • Elements are often symbolized with their mass ...
... • Elements are often symbolized with their mass ...
Atoms and the Periodic Table
... ◦ Electrons move in set paths around the nucleus. ◦ Each electron has a certain energy, and the path defines the electrons energy level. ...
... ◦ Electrons move in set paths around the nucleus. ◦ Each electron has a certain energy, and the path defines the electrons energy level. ...
Atomic Structure - OCPS TeacherPress
... The number of valence electrons in an atom will determine if an element will allow electricity to flow. The ability of an atom to draw electrons to itself (away from its neighbors) is called Electronegativity. ...
... The number of valence electrons in an atom will determine if an element will allow electricity to flow. The ability of an atom to draw electrons to itself (away from its neighbors) is called Electronegativity. ...
Atomic Structure Power Point
... So how can you have part of a neutron, such as 119.97 ? Because of ISOTOPES ! An isotope is a form of an element that has the same number of protons, but different numbers of neutrons. The atomic mass on the periodic table reflects the average mass of all of the known isotopes of an element. Each i ...
... So how can you have part of a neutron, such as 119.97 ? Because of ISOTOPES ! An isotope is a form of an element that has the same number of protons, but different numbers of neutrons. The atomic mass on the periodic table reflects the average mass of all of the known isotopes of an element. Each i ...
Isotope PPT - MrsPage.com
... Contain protons, neutrons, and electrons Protons & neutrons are found in the nucleus The nucleus contains most of the mass of an atom Electrons are distributed around the nucleus in energy levels/shells/orbitals (which make up the electron cloud) The outermost electrons in the shell farthest from th ...
... Contain protons, neutrons, and electrons Protons & neutrons are found in the nucleus The nucleus contains most of the mass of an atom Electrons are distributed around the nucleus in energy levels/shells/orbitals (which make up the electron cloud) The outermost electrons in the shell farthest from th ...
Revision map for the Periodic Table
... 21. The rows of elements are called periods. 22. The higher the atomic number of an element, the higher the period. 23. The number of shells of electrons determines the period an element is in. 24. The Periodic Table is arranged in several blocks. 25. The elements are arranged in columns in the Peri ...
... 21. The rows of elements are called periods. 22. The higher the atomic number of an element, the higher the period. 23. The number of shells of electrons determines the period an element is in. 24. The Periodic Table is arranged in several blocks. 25. The elements are arranged in columns in the Peri ...
Section 4.3 Notes
... 1. Describe periodic trends in the ionization energy, atomic radius, and electronegativity. 2. Relate the periodic trends to the atomic structures of the elements. 3. Describe periodic trends in ionic size, electron affinity, and melting and boiling points, and relate them to periodic trends in the ...
... 1. Describe periodic trends in the ionization energy, atomic radius, and electronegativity. 2. Relate the periodic trends to the atomic structures of the elements. 3. Describe periodic trends in ionic size, electron affinity, and melting and boiling points, and relate them to periodic trends in the ...
Section 3 The Periodic Table
... Electrons are placed in energy levels. Energy levels nearer the nucleus have lower energy than those levels that are farther away. ...
... Electrons are placed in energy levels. Energy levels nearer the nucleus have lower energy than those levels that are farther away. ...
lecture_CH1-2review_chem121pikul
... Distinguish the difference between chemical and physical properties & changes We represent uncertainty with significant figures You do not need to memorize Sig Fig rules Scientific Notation Conversions within the metric system and non metric units Temperature conversions Density & Spec ...
... Distinguish the difference between chemical and physical properties & changes We represent uncertainty with significant figures You do not need to memorize Sig Fig rules Scientific Notation Conversions within the metric system and non metric units Temperature conversions Density & Spec ...
Goal 4.01
... Then determine the number of electrons within the atom. Draw the 1st orbit and fill that orbit with electrons. Electrons are drawn on the orbit line as a solid circle. Continuing drawing and filling orbits until the correct number of electrons is reached. ...
... Then determine the number of electrons within the atom. Draw the 1st orbit and fill that orbit with electrons. Electrons are drawn on the orbit line as a solid circle. Continuing drawing and filling orbits until the correct number of electrons is reached. ...
AP Chem Test 5-7 Practice Exam - mvhs
... 2. The table above shows the first three ionization energies for atoms of four elements from the third period of the periodic table. The elements are numbered randomly. Use the information in the table to answer the following questions. (a) Which element is most metallic in character? Explain your r ...
... 2. The table above shows the first three ionization energies for atoms of four elements from the third period of the periodic table. The elements are numbered randomly. Use the information in the table to answer the following questions. (a) Which element is most metallic in character? Explain your r ...
PPT Test Review
... elements in the periodic table, the number of valence electrons____________ from left to right. ...
... elements in the periodic table, the number of valence electrons____________ from left to right. ...