Honors Chemistry
... Opposites attract : the positive or more metallic ion goes first when writing the formula The farther to the left on the periodic table, the more metallic. When writing a compound’s formula, write the ions’ symbols with the charge. If the charges add up to zero, then just put the symbols together to ...
... Opposites attract : the positive or more metallic ion goes first when writing the formula The farther to the left on the periodic table, the more metallic. When writing a compound’s formula, write the ions’ symbols with the charge. If the charges add up to zero, then just put the symbols together to ...
Chemistry for BIOS 302
... • Salts are ionic compounds that don’t release H+ or OH- when they dissolve. Thus, sodium chloride is a salt because it dissolves to form Na+ and Cl- , while hydrogen chloride (hydrochloric acid, HCl) is an acid because it dissolves to form H+ and Cl-. • Acids usually have an associated salt. An exa ...
... • Salts are ionic compounds that don’t release H+ or OH- when they dissolve. Thus, sodium chloride is a salt because it dissolves to form Na+ and Cl- , while hydrogen chloride (hydrochloric acid, HCl) is an acid because it dissolves to form H+ and Cl-. • Acids usually have an associated salt. An exa ...
chemical bonding and molecular structure
... Matter is made up of one or different type of elements. Under normal conditions no other element exists as an independent atom in nature, except noble gases. However, a group of atoms is found to exist together as one species having characteristic properties. Such a group of atoms is called a molecu ...
... Matter is made up of one or different type of elements. Under normal conditions no other element exists as an independent atom in nature, except noble gases. However, a group of atoms is found to exist together as one species having characteristic properties. Such a group of atoms is called a molecu ...
chapter_2_2007
... – Chemical substances composed of the same kind of atoms. – Listed on the periodic table. – Each element is represented by a symbol of one or two letters. – The principal elements that comprise living things are: C, H, O, P, K, I, N, S, Ca, Fe, and Mg. ...
... – Chemical substances composed of the same kind of atoms. – Listed on the periodic table. – Each element is represented by a symbol of one or two letters. – The principal elements that comprise living things are: C, H, O, P, K, I, N, S, Ca, Fe, and Mg. ...
Chapter 5 PPT
... quantum theory into the hydrogen spectrum explanation. Here are the postulates of Bohr’s theory. Atom has a number of definite and discrete energy levels (orbits) in which an electron may exist without emitting or absorbing electromagnetic radiation. As the orbital radius increases so does the energ ...
... quantum theory into the hydrogen spectrum explanation. Here are the postulates of Bohr’s theory. Atom has a number of definite and discrete energy levels (orbits) in which an electron may exist without emitting or absorbing electromagnetic radiation. As the orbital radius increases so does the energ ...
Reactions of Metals and Their Compounds
... Do you remember what they are? • CORE electrons: Electrons that are in full shells. If we use the example of Na (sodium) , the electrons in the first shell ( 2 electrons) and the electrons in the second shell ( 8 electrons) are both found in full shells. These are the core electrons. • VALENCE elec ...
... Do you remember what they are? • CORE electrons: Electrons that are in full shells. If we use the example of Na (sodium) , the electrons in the first shell ( 2 electrons) and the electrons in the second shell ( 8 electrons) are both found in full shells. These are the core electrons. • VALENCE elec ...
Science 10 Chem - Holy Trinity Academy
... Element: a substance that cannot be broken down any further by a chemical reaction into any simpler substance. pure substances that contain a single kind of atom Each element differs from the others because it has distinct physical and chemical properties ...
... Element: a substance that cannot be broken down any further by a chemical reaction into any simpler substance. pure substances that contain a single kind of atom Each element differs from the others because it has distinct physical and chemical properties ...
15anespp
... The four orbitals (an s and three p’s) combine or HYBRIDISE to give four new orbitals. All four orbitals are equivalent. Because one s and three p orbitals are used, it is called sp3 hybridisation ...
... The four orbitals (an s and three p’s) combine or HYBRIDISE to give four new orbitals. All four orbitals are equivalent. Because one s and three p orbitals are used, it is called sp3 hybridisation ...
Document
... When there are not enough electrons for single bonds the molecule forms multiple bonds and the structure differs. VSEPR theory treats each multiple bond as a single electron group, because it occupies roughly the same region of space. The number of electron groups around an atom is called the atom’s ...
... When there are not enough electrons for single bonds the molecule forms multiple bonds and the structure differs. VSEPR theory treats each multiple bond as a single electron group, because it occupies roughly the same region of space. The number of electron groups around an atom is called the atom’s ...
Chemistry 101 Chapter 4 Elements, Atoms, and Ions = =
... Natural states of the elements: some elements consist of single atoms and they are found in an isolated state (for example, Ar and He). They are called monatomic elements. Some elements are diatomic and they consist of two atoms. The atoms of these elements have special affinities for each other and ...
... Natural states of the elements: some elements consist of single atoms and they are found in an isolated state (for example, Ar and He). They are called monatomic elements. Some elements are diatomic and they consist of two atoms. The atoms of these elements have special affinities for each other and ...
Lecture notes chapter 4
... Natural states of the elements: some elements consist of single atoms and they are found in an isolated state (for example, Ar and He). They are called monatomic elements. Some elements are diatomic and they consist of two atoms. The atoms of these elements have special affinities for each other and ...
... Natural states of the elements: some elements consist of single atoms and they are found in an isolated state (for example, Ar and He). They are called monatomic elements. Some elements are diatomic and they consist of two atoms. The atoms of these elements have special affinities for each other and ...
High School Curriculum Standards: Chemistry
... Chemistry is the study of matter—its properties and its changes. The idea that matter is made up of particles is over 2000 years old, but the idea of using properties of these particles to explain observable characteristics of matter has more recent origins. In ancient Greece, it was proposed that m ...
... Chemistry is the study of matter—its properties and its changes. The idea that matter is made up of particles is over 2000 years old, but the idea of using properties of these particles to explain observable characteristics of matter has more recent origins. In ancient Greece, it was proposed that m ...
2012 Coaches Institute Presentation
... The percentage of acid molecules that ionize in water is another measure of the strength of an acid % Ionization = M(ionized acid) x ...
... The percentage of acid molecules that ionize in water is another measure of the strength of an acid % Ionization = M(ionized acid) x ...
Chapter 8
... one or more electrons. When the atom loses an electron, it does not become a different element because it still has the same number of protons. A positively charged ion is called a cation. Elements on the left side of the periodic table tend to lose some of their electrons. ...
... one or more electrons. When the atom loses an electron, it does not become a different element because it still has the same number of protons. A positively charged ion is called a cation. Elements on the left side of the periodic table tend to lose some of their electrons. ...
4.1 PPT- Atomic Theory and Bonding
... • It has three electron shells, so it is in period 3. • It has eight electrons in the outer (valence) shell. ...
... • It has three electron shells, so it is in period 3. • It has eight electrons in the outer (valence) shell. ...
Answer key
... Protons and neutrons are found in the center of the atom, called the nucleus. The electrons move about in the electron cloud that surrounds the nucleus. 46. Which subatomic particle(s) defines the identity of the atom? Protons 47. Which subatomic particle(s) determines chemical properties? electrons ...
... Protons and neutrons are found in the center of the atom, called the nucleus. The electrons move about in the electron cloud that surrounds the nucleus. 46. Which subatomic particle(s) defines the identity of the atom? Protons 47. Which subatomic particle(s) determines chemical properties? electrons ...
File
... Protons and neutrons are found in the center of the atom, called the nucleus. The electrons move about in the electron cloud that surrounds the nucleus. 46. Which subatomic particle(s) defines the identity of the atom? Protons 47. Which subatomic particle(s) determines chemical properties? electrons ...
... Protons and neutrons are found in the center of the atom, called the nucleus. The electrons move about in the electron cloud that surrounds the nucleus. 46. Which subatomic particle(s) defines the identity of the atom? Protons 47. Which subatomic particle(s) determines chemical properties? electrons ...
Page | 1 MATS1101 Chemistry notes semester 2 2012 TOPIC 1
... Using this theory we can explain three fundamental laws of chemical behaviour: 1. Law of Conservation of Mass and Energy: Matter is neither created or destroyed in a chemical reaction. Energy is neither created or destroyed in a chemical reaction, but it may be transformed from one form to another. ...
... Using this theory we can explain three fundamental laws of chemical behaviour: 1. Law of Conservation of Mass and Energy: Matter is neither created or destroyed in a chemical reaction. Energy is neither created or destroyed in a chemical reaction, but it may be transformed from one form to another. ...
What is Chemistry? Chemistry
... o What makes an element reactive? o An incomplete __________________________________________. o All atoms (except hydrogen) want to have 8 electrons in their very outermost energy level (This is called the octet rule.) o Atoms bond until this level is complete. Atoms with less than 4 valence electro ...
... o What makes an element reactive? o An incomplete __________________________________________. o All atoms (except hydrogen) want to have 8 electrons in their very outermost energy level (This is called the octet rule.) o Atoms bond until this level is complete. Atoms with less than 4 valence electro ...
Molecular orbital diagram
A molecular orbital diagram, or MO diagram, is a qualitative descriptive tool explaining chemical bonding in molecules in terms of molecular orbital theory in general and the linear combination of atomic orbitals (LCAO) molecular orbital method in particular. A fundamental principle of these theories is that as atoms bond to form molecules, a certain number of atomic orbitals combine to form the same number of molecular orbitals, although the electrons involved may be redistributed among the orbitals. This tool is very well suited for simple diatomic molecules such as dihydrogen, dioxygen, and carbon monoxide but becomes more complex when discussing even comparatively simple polyatomic molecules, such as methane. MO diagrams can explain why some molecules exist and others do not. They can also predict bond strength, as well as the electronic transitions that can take place.