Practice Test #7
... If 54.0 grams of water are mixed with excess magnesium nitride, then how many grams of ammonia (NH3) are produced? a. 1.00 g b. 17.0 g c. 51.0 g d. 153 g 27) A mass of 5.4 grams of aluminum (Al) reacts with an excess of copper (II) chloride (CuCl2) in solution, as shown below. 3CuCl2 + 2Al → 2AlCl3 ...
... If 54.0 grams of water are mixed with excess magnesium nitride, then how many grams of ammonia (NH3) are produced? a. 1.00 g b. 17.0 g c. 51.0 g d. 153 g 27) A mass of 5.4 grams of aluminum (Al) reacts with an excess of copper (II) chloride (CuCl2) in solution, as shown below. 3CuCl2 + 2Al → 2AlCl3 ...
AToms
... charged subatomic particle. They are much smaller than protons. Protons and neutrons have nearly 2000 times the mass of an electron. Electrons are in constant motion around the nucleus, acting like a cloud. The flow of electrons from one atom to another is electricity. ...
... charged subatomic particle. They are much smaller than protons. Protons and neutrons have nearly 2000 times the mass of an electron. Electrons are in constant motion around the nucleus, acting like a cloud. The flow of electrons from one atom to another is electricity. ...
EXAM II Total Points = 125 TA Tues
... The number of filled orbitals corresponds to the atom's atomic number. If the atom is electrically neutral, the number of electrons corresponds to the atom's atomic number. Using the periodic table, the outermost filled orbital indicates the group while the number of occupied orbitals indicates the ...
... The number of filled orbitals corresponds to the atom's atomic number. If the atom is electrically neutral, the number of electrons corresponds to the atom's atomic number. Using the periodic table, the outermost filled orbital indicates the group while the number of occupied orbitals indicates the ...
1. All matter is made up of
... 17. Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles? 1. Use tweezers to separate them. 2. Add water to the mixture. 3. Use a magnet to separate them. 4. Pour the mixture into a filter. ...
... 17. Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles? 1. Use tweezers to separate them. 2. Add water to the mixture. 3. Use a magnet to separate them. 4. Pour the mixture into a filter. ...
Chapter 13
... Periodic Trend – There is a decrease in the size of cations as you move across a period from left to right – when you get to group 4A the anions (which are much larger) start to decrease in size Group Trend – Ionic size (both cations and anions) increases as you go down each group. ...
... Periodic Trend – There is a decrease in the size of cations as you move across a period from left to right – when you get to group 4A the anions (which are much larger) start to decrease in size Group Trend – Ionic size (both cations and anions) increases as you go down each group. ...
Unit 2
... • All atoms are neutral • The same numbers of electrons in an atom as there are protons. • The identity of an atom is determined by the number of protons, not by the number of electrons or neutrons. • The number of electrons and the number of neutrons can each vary and the atom will still be of the ...
... • All atoms are neutral • The same numbers of electrons in an atom as there are protons. • The identity of an atom is determined by the number of protons, not by the number of electrons or neutrons. • The number of electrons and the number of neutrons can each vary and the atom will still be of the ...
atom - BSCSChemistryA
... The composition of atoms • However, this was all changed in 1909, when Rutherford’s students, Geiger and Marsden, performed an experiment where they fired alpha particles* at a sheet of gold foil and found that some immediately bounced back! • This led to Rutherford proposing that atoms are made up ...
... The composition of atoms • However, this was all changed in 1909, when Rutherford’s students, Geiger and Marsden, performed an experiment where they fired alpha particles* at a sheet of gold foil and found that some immediately bounced back! • This led to Rutherford proposing that atoms are made up ...
Topic 3 Periodic Trends Notes 14-15
... associated with the four sub-levels: s, p, d, and g 2. The Periodic Table consists of groups (vertical columns) and periods (horizontal rows) 3. The period number (n) is the outer energy level that is occupied by electrons 4. The number of the principal energy level and the number of the valence ele ...
... associated with the four sub-levels: s, p, d, and g 2. The Periodic Table consists of groups (vertical columns) and periods (horizontal rows) 3. The period number (n) is the outer energy level that is occupied by electrons 4. The number of the principal energy level and the number of the valence ele ...
Unit 3 Periodic Table Vocabulary
... Electrons - Also called negatron. Physics, Chemistry . an elementary particle that is a fundamental constituent of matter, having a negative charge of 1.602 × 10 −19 coulombs, a mass of 9.108 × 10 −31 kilograms, and spin of ½, and existing independently or as the component outside the nucleus of an ...
... Electrons - Also called negatron. Physics, Chemistry . an elementary particle that is a fundamental constituent of matter, having a negative charge of 1.602 × 10 −19 coulombs, a mass of 9.108 × 10 −31 kilograms, and spin of ½, and existing independently or as the component outside the nucleus of an ...
10-24 The_Periodic_Table_1
... repeating patterns of their properties. c) A Russian named Dimitri Mendeleev is credited with its creation in 1869. ...
... repeating patterns of their properties. c) A Russian named Dimitri Mendeleev is credited with its creation in 1869. ...
1 Subatomic Particles – Lets Review Again! General Information: An
... ♦ Atomic Number (Z) - The number of protons (and electrons) in the nucleus of an atom. ♦ Mass Number (A) – The total number of protons and neutrons in the nucleus of an atom. ♦ Isotope – Atoms of an element having the same number of protons and electrons but different number of neutrons. ♦ Average A ...
... ♦ Atomic Number (Z) - The number of protons (and electrons) in the nucleus of an atom. ♦ Mass Number (A) – The total number of protons and neutrons in the nucleus of an atom. ♦ Isotope – Atoms of an element having the same number of protons and electrons but different number of neutrons. ♦ Average A ...
The format of this test is MULTIPLE CHOICE
... 5. How does an atom’s position on the periodic table provide information on that atom’s size (atomic radius)? The farther left in the period, the larger the atom, the further down a group it is, the larger it is. 6. What is electronegativity and why do nonmetals have high values for it? How attracti ...
... 5. How does an atom’s position on the periodic table provide information on that atom’s size (atomic radius)? The farther left in the period, the larger the atom, the further down a group it is, the larger it is. 6. What is electronegativity and why do nonmetals have high values for it? How attracti ...
Atoms - Peoria Public Schools
... • Aristotle’s idea were more widely accepted as the way in which matter existed, and his opinion was accepted for nearly 2000 years ...
... • Aristotle’s idea were more widely accepted as the way in which matter existed, and his opinion was accepted for nearly 2000 years ...
Electronegativity Periodic Trend
... button above the miniature periodic table. Now you can choose which elements, groups and/or periods you would like to graph. Select any period (excluding 1, 6 and 7) on the periodic table by clicking on the period number on the left. In the Graph window to the right, click on “X” or “Y” to choose th ...
... button above the miniature periodic table. Now you can choose which elements, groups and/or periods you would like to graph. Select any period (excluding 1, 6 and 7) on the periodic table by clicking on the period number on the left. In the Graph window to the right, click on “X” or “Y” to choose th ...
Chapter 5 Organizing The Elements
... • In 1750 scientists had identified only ____elements most of these were metals • As the number of identified elements grew so did the need for organization • In 1789 Antoine Lavoisier grouped elements according to categories called______, non-metals, ______and earths • In 1860 Mendeleev (Russian) n ...
... • In 1750 scientists had identified only ____elements most of these were metals • As the number of identified elements grew so did the need for organization • In 1789 Antoine Lavoisier grouped elements according to categories called______, non-metals, ______and earths • In 1860 Mendeleev (Russian) n ...
Bill Nye: Atoms - Kenston Local Schools
... Write down 3 things you already knew about chemical reactions that were confirmed through watching the video: ...
... Write down 3 things you already knew about chemical reactions that were confirmed through watching the video: ...
Electrons in Atoms
... The Quantum Mechanical Model • The modern description of the electrons in atoms, the Quantum Mechanical Model, comes from the mathematical solutions to the ...
... The Quantum Mechanical Model • The modern description of the electrons in atoms, the Quantum Mechanical Model, comes from the mathematical solutions to the ...
CHEM 1411 CHAPTER 2
... The law states that all pure samples of a chemical compound contain same elements combined in the same fixed proportion by mass. Law of Multiple Proportions The law states that when two elements combine together to form more than one compound, the different masses of one of the elements combining wi ...
... The law states that all pure samples of a chemical compound contain same elements combined in the same fixed proportion by mass. Law of Multiple Proportions The law states that when two elements combine together to form more than one compound, the different masses of one of the elements combining wi ...
The format of this test is MULTIPLE CHOICE
... 5. __freezing___ changes a liquid into a solid. 6. A mixture is made up of 2 or more substances that are physically combined (and can be separated). 7. When a liquid becomes a gas, __evaporation_____ occurs. 8. A mixture that is uniform (evenly spread) throughout the sample is said to be _homogenous ...
... 5. __freezing___ changes a liquid into a solid. 6. A mixture is made up of 2 or more substances that are physically combined (and can be separated). 7. When a liquid becomes a gas, __evaporation_____ occurs. 8. A mixture that is uniform (evenly spread) throughout the sample is said to be _homogenous ...
Webquest: Atomic Theories and Models
... Atom Basics: Go to: http://www.chemtutor.com/struct.htm and read the “And you thought you were strange” section to answer the following questions (put answers in the table). 1. What are the three subatomic particles that all atoms are made of? 2. Where are each of the three particles located wi ...
... Atom Basics: Go to: http://www.chemtutor.com/struct.htm and read the “And you thought you were strange” section to answer the following questions (put answers in the table). 1. What are the three subatomic particles that all atoms are made of? 2. Where are each of the three particles located wi ...
Unit 1 – Atomic Structure
... a. Small amounts of missing mass are converted to HUGE amounts of energy (E = mc2) B. Nuclear Chain Reaction 1. A reaction in which the material that starts the reaction is also one of the products and can start another reaction ...
... a. Small amounts of missing mass are converted to HUGE amounts of energy (E = mc2) B. Nuclear Chain Reaction 1. A reaction in which the material that starts the reaction is also one of the products and can start another reaction ...
3. all atoms of a given element are identical in mass and other
... When: Late 1700s to early 1800s (1803) What was their contribution: Developed the modern atomic theory and the concepts of atomic weight If possible, how did they determine their contribution: Experimentation and proposing the law of multiple proportions (when two elements react to form more than on ...
... When: Late 1700s to early 1800s (1803) What was their contribution: Developed the modern atomic theory and the concepts of atomic weight If possible, how did they determine their contribution: Experimentation and proposing the law of multiple proportions (when two elements react to form more than on ...