An atom - Ms. Buicke maths and science
... number of protons, neutrons and electrons they have. Each element in the periodic table has a number written above and below its symbol. The smaller number is called the atomic number. This tells us how many protons every atom of that element has. The number of protons in an atom is always equal to ...
... number of protons, neutrons and electrons they have. Each element in the periodic table has a number written above and below its symbol. The smaller number is called the atomic number. This tells us how many protons every atom of that element has. The number of protons in an atom is always equal to ...
2.1 Basic Chemistry
... • Ions are charged particles that form when electrons are transferred from one atom to another. Atoms that gain or lose electrons are called: Ions • Positive ions are Cations (positive charge, resulting from loss of electron) • Negative ions are Anions (negative charge, resulting from gain of electr ...
... • Ions are charged particles that form when electrons are transferred from one atom to another. Atoms that gain or lose electrons are called: Ions • Positive ions are Cations (positive charge, resulting from loss of electron) • Negative ions are Anions (negative charge, resulting from gain of electr ...
Atomic Structure PP
... 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. ...
Chemical Building Blocks Chapter One
... Characteristic Property: a quality of a substance that never changes and can be used to identify the substances (pg. 15) Boiling Point: the temperature at which a substance changes from a liquid to a gas (pg. 16) Physical Change: a change in a substance that does not change its identity; for example ...
... Characteristic Property: a quality of a substance that never changes and can be used to identify the substances (pg. 15) Boiling Point: the temperature at which a substance changes from a liquid to a gas (pg. 16) Physical Change: a change in a substance that does not change its identity; for example ...
Chapter 11 and 12-2 Review/Study Guide for Test
... 1. List the major discovery or accomplishment associated with of each of the following scientists: a. Democritus – named the atom b. Dalton – said the atom was positively charged, had his atomic theory (all atoms of the same element are the same, atoms of different elements are different, everything ...
... 1. List the major discovery or accomplishment associated with of each of the following scientists: a. Democritus – named the atom b. Dalton – said the atom was positively charged, had his atomic theory (all atoms of the same element are the same, atoms of different elements are different, everything ...
Parts of the Atom - Issaquah Connect
... Parts of the Atom: 2 parts: Nucleus and electron cloud ________ ...
... Parts of the Atom: 2 parts: Nucleus and electron cloud ________ ...
Mass Defect (not in book)
... The earth is made of oxygen (49%), silicon (26%), aluminum (7.5 %), and a host of other elements. The human body is also made of a lot of oxygen (65%), but in addition has a lot of carbon (18%) and hydrogen (10%). There are also a lot of trace elements in the body (trace elements are needed for life ...
... The earth is made of oxygen (49%), silicon (26%), aluminum (7.5 %), and a host of other elements. The human body is also made of a lot of oxygen (65%), but in addition has a lot of carbon (18%) and hydrogen (10%). There are also a lot of trace elements in the body (trace elements are needed for life ...
Name: Date: ______ Period: Unit 3 – Atomic Structure Review
... Time Line review 1. Who was the ancient Greek philosopher who first proposed the notion of the atom? Democritus 2. What was Dalton’s atomic model called? Billard ball model 3. Who’s model first introduced the concept of energy levels? Bohr 4. What were the major problems of Dalton’s atomic theory? D ...
... Time Line review 1. Who was the ancient Greek philosopher who first proposed the notion of the atom? Democritus 2. What was Dalton’s atomic model called? Billard ball model 3. Who’s model first introduced the concept of energy levels? Bohr 4. What were the major problems of Dalton’s atomic theory? D ...
Chemistry Readings
... containing a small number of atoms are called simple molecules. A molecule is the smallest particle of a compound that still retains all of the properties of the compound. Two Chlorine atoms will share one electron each to form a stable Cl2 molecule. Each Chlorine atom in the molecule has 8 electron ...
... containing a small number of atoms are called simple molecules. A molecule is the smallest particle of a compound that still retains all of the properties of the compound. Two Chlorine atoms will share one electron each to form a stable Cl2 molecule. Each Chlorine atom in the molecule has 8 electron ...
Standard B-2
... o Enzymes: proteins that serve as catalysts in living organisms. o Enzymes are very specific. Each particular enzyme can catalyze only one chemical reaction by working on one particular reactant (substrate). o The structure of enzymes can be altered by temp and pH, so each catalyst works best at a s ...
... o Enzymes: proteins that serve as catalysts in living organisms. o Enzymes are very specific. Each particular enzyme can catalyze only one chemical reaction by working on one particular reactant (substrate). o The structure of enzymes can be altered by temp and pH, so each catalyst works best at a s ...
Physical Science Semester 2 Final Exam 2013 –STUDY GUIDE
... 18. The SI (metric) unit for energy is the ____. 19. You can calculate kinetic energy by using the equation ____. 20. You can calculate gravitational potential energy by using the equation ____. 21. According to the law of conservation of energy, the total amount of energy in the universe ____. 22. ...
... 18. The SI (metric) unit for energy is the ____. 19. You can calculate kinetic energy by using the equation ____. 20. You can calculate gravitational potential energy by using the equation ____. 21. According to the law of conservation of energy, the total amount of energy in the universe ____. 22. ...
The Periodic Table - River Dell Regional School District
... 1. All matter is made up of small particles called atoms. 2. Atoms of the same element have the same chemical properties while atoms of different elements have different properties (isotopes) 3. Not all atoms of an element have the same mass, but they all have a definite average mass which is charac ...
... 1. All matter is made up of small particles called atoms. 2. Atoms of the same element have the same chemical properties while atoms of different elements have different properties (isotopes) 3. Not all atoms of an element have the same mass, but they all have a definite average mass which is charac ...
Ch. 4 Notes – THE STRUCTURE OF THE ATOM NOTE
... 2) Aristotle (384-322 B.C.): did not believe in atoms a) “hyle”— continuous state of all matter b) His theory was widely accepted until the 17th century! 3) Sir Isaac Newton (1642-1727) worked without proof to support atomic theory (Laws of physics, gravitation....) 4) Robert Boyle (1627-1691) also ...
... 2) Aristotle (384-322 B.C.): did not believe in atoms a) “hyle”— continuous state of all matter b) His theory was widely accepted until the 17th century! 3) Sir Isaac Newton (1642-1727) worked without proof to support atomic theory (Laws of physics, gravitation....) 4) Robert Boyle (1627-1691) also ...
Unit 2.2 Test Review Key
... Right graph – shows that the energy is being released – when you look at the data line, the products have less energy than the initial reactants ...
... Right graph – shows that the energy is being released – when you look at the data line, the products have less energy than the initial reactants ...
Chemistry Standards and Frameworks
... metals conduct electricity well. When an electron from an atom with low electronegativity (e.g., a metal) is removed by another atom with high electronegativity (e.g., a nonmetal), the two atoms become oppositely charged ions that attract each other, resulting in an ionic bond. Chemical bonds betwee ...
... metals conduct electricity well. When an electron from an atom with low electronegativity (e.g., a metal) is removed by another atom with high electronegativity (e.g., a nonmetal), the two atoms become oppositely charged ions that attract each other, resulting in an ionic bond. Chemical bonds betwee ...
AP Chemistry Test Review
... 46) know the signs for ∆S, ∆G, and ∆H and when each of the values are zero 47) spontaneous reactions have −∆G or + E°cell 48) ∆G° = zero for pure elements in their standard state 49) LEO- ANO; CPR-GER…how to balance redox reactions and find ox. agents or red. agents 50) calculate E°cell and be able ...
... 46) know the signs for ∆S, ∆G, and ∆H and when each of the values are zero 47) spontaneous reactions have −∆G or + E°cell 48) ∆G° = zero for pure elements in their standard state 49) LEO- ANO; CPR-GER…how to balance redox reactions and find ox. agents or red. agents 50) calculate E°cell and be able ...
Atomic Theory – Scientist Timeline
... Below is a list of individuals that have made significant contributions to the concept of the atomic theory. Your task today is to match the scientist with the appropriate description. Some scientists will have more than one description associated with them. Activity 1: Timeline Under each scientist ...
... Below is a list of individuals that have made significant contributions to the concept of the atomic theory. Your task today is to match the scientist with the appropriate description. Some scientists will have more than one description associated with them. Activity 1: Timeline Under each scientist ...
PHS 004lecture1
... • Depending on their energy they are locked into a certain area in the cloud. • Electrons with the lowest energy are found in the energy level closest to the nucleus • Electrons with the highest energy are found in the outermost energy levels, farther from the nucleus. ...
... • Depending on their energy they are locked into a certain area in the cloud. • Electrons with the lowest energy are found in the energy level closest to the nucleus • Electrons with the highest energy are found in the outermost energy levels, farther from the nucleus. ...
Periodic Table Quiz
... 3. An unknown sample is malleable and ductile. Where on the periodic table would the sample most likely be found? a. To the right of the zig-zag line. b. Bordering right on the zig-zag line. c. To the left of the zig-zag line. d. There are no elements that are both malleable and ductile found on the ...
... 3. An unknown sample is malleable and ductile. Where on the periodic table would the sample most likely be found? a. To the right of the zig-zag line. b. Bordering right on the zig-zag line. c. To the left of the zig-zag line. d. There are no elements that are both malleable and ductile found on the ...
Chapter 4 PPT
... a) Cathode rays have identical properties regardless of the element used to produce them. All elements must contain identically charged electrons. b) Atoms are neutral, so there must be positive particles in the atom to balance the negative charge of the electrons c) Electrons have so little mass th ...
... a) Cathode rays have identical properties regardless of the element used to produce them. All elements must contain identically charged electrons. b) Atoms are neutral, so there must be positive particles in the atom to balance the negative charge of the electrons c) Electrons have so little mass th ...
Unit 3 Lesson 1
... • In 1808, John Dalton published an atomic theory, stating that all matter is made up of atoms that cannot be created, divided, or destroyed. • This theory also stated that all atoms of a certain element are identical, but they differ from atoms of all other elements. • Every substance is made up of ...
... • In 1808, John Dalton published an atomic theory, stating that all matter is made up of atoms that cannot be created, divided, or destroyed. • This theory also stated that all atoms of a certain element are identical, but they differ from atoms of all other elements. • Every substance is made up of ...
atoms - schultz915
... what is now called the “proton” particles with a positive charge, and a relative mass of 1 (or 1840 times that of an electron) ...
... what is now called the “proton” particles with a positive charge, and a relative mass of 1 (or 1840 times that of an electron) ...
Atoms Molecules and Ions Atoms, Molecules, and Ions
... Dalton’s Atomic Theory (1808) All matter is composed of extremely small particles called atoms Atoms of a given element are identical in size, mass, and other properties; atoms of different John Dalton elements l differ diff in i size, i mass, and d other properties Atoms cannot be subdivided ...
... Dalton’s Atomic Theory (1808) All matter is composed of extremely small particles called atoms Atoms of a given element are identical in size, mass, and other properties; atoms of different John Dalton elements l differ diff in i size, i mass, and d other properties Atoms cannot be subdivided ...
History of molecular theory
In chemistry, the history of molecular theory traces the origins of the concept or idea of the existence of strong chemical bonds between two or more atoms.The modern concept of molecules can be traced back towards pre-scientific Greek philosophers such as Leucippus who argued that all the universe is composed of atoms and voids. Circa 450 BC Empedocles imagined fundamental elements (fire (20px), earth (20px), air (20px), and water (20px)) and ""forces"" of attraction and repulsion allowing the elements to interact. Prior to this, Heraclitus had claimed that fire or change was fundamental to our existence, created through the combination of opposite properties. In the Timaeus, Plato, following Pythagoras, considered mathematical entities such as number, point, line and triangle as the fundamental building blocks or elements of this ephemeral world, and considered the four elements of fire, air, water and earth as states of substances through which the true mathematical principles or elements would pass. A fifth element, the incorruptible quintessence aether, was considered to be the fundamental building block of the heavenly bodies. The viewpoint of Leucippus and Empedocles, along with the aether, was accepted by Aristotle and passed to medieval and renaissance Europe. A modern conceptualization of molecules began to develop in the 19th century along with experimental evidence for pure chemical elements and how individual atoms of different chemical substances such as hydrogen and oxygen can combine to form chemically stable molecules such as water molecules.