![unit 2 - chemistry](http://s1.studyres.com/store/data/010303053_1-37e720b9cc55462a52b7ade67d6ec718-300x300.png)
unit 2 - chemistry
... A. Basic definitions 1. matter – anything that occupies space and has mass 2. element – basic unit of all matter (109 total) a. 92 natural elements b. 4 basic – H, C, O, N, -96% of human mass Ca, P -> 99% (3%) K, S, Cl, Mg, I, FE, (16 other)1% -> ...
... A. Basic definitions 1. matter – anything that occupies space and has mass 2. element – basic unit of all matter (109 total) a. 92 natural elements b. 4 basic – H, C, O, N, -96% of human mass Ca, P -> 99% (3%) K, S, Cl, Mg, I, FE, (16 other)1% -> ...
2nd Semester Chemistry Terms - Glancy 4TH PERIOD PHYSICAL
... 48. Chemical change- a change in which the atoms of one or more substances are rearranged into one or more new substances 49. Chemical reaction- synonymous with chemical change 50. Elemental formula- a notation that uses the atomic symbol and a numerical subscript to denote how atoms of the element ...
... 48. Chemical change- a change in which the atoms of one or more substances are rearranged into one or more new substances 49. Chemical reaction- synonymous with chemical change 50. Elemental formula- a notation that uses the atomic symbol and a numerical subscript to denote how atoms of the element ...
Chemical Equations
... (aka Oxidation Number) Hypothetical charge use to indicate the degree of oxidation (loss of electrons) Rules in assigning oxidation states: 1) The oxidation state of a free element is zero (0). ex. O2 (g), Ag (s) 2) The oxidation state of a monatomic ion is equal to its ionic charge. (ex. Na+, Cl-3) ...
... (aka Oxidation Number) Hypothetical charge use to indicate the degree of oxidation (loss of electrons) Rules in assigning oxidation states: 1) The oxidation state of a free element is zero (0). ex. O2 (g), Ag (s) 2) The oxidation state of a monatomic ion is equal to its ionic charge. (ex. Na+, Cl-3) ...
The Mole - Rothschild Science
... 10 million per second, it would take about 2 billion years to count the atoms in one mole. ...
... 10 million per second, it would take about 2 billion years to count the atoms in one mole. ...
Organic Chemistry
... 3. Keep track of lone pairs and formal charges. 4. Use arrow-pushing formalism to interconvert and identifiy possible resonance structures. 5. Always use double-headed arrow ( ) in between resonance structures. 6. Lower energy resonance structures contribute most to the overall structure of the mole ...
... 3. Keep track of lone pairs and formal charges. 4. Use arrow-pushing formalism to interconvert and identifiy possible resonance structures. 5. Always use double-headed arrow ( ) in between resonance structures. 6. Lower energy resonance structures contribute most to the overall structure of the mole ...
12-3: Lewis Structures
... o Octet Rule—most elements will be surrounded by 8 dots, representing noble gas configuration Hydrogen is full with 2 electrons (2 dots on one side)—so it is like helium Draw the Lewis structures for: H Ca N F ...
... o Octet Rule—most elements will be surrounded by 8 dots, representing noble gas configuration Hydrogen is full with 2 electrons (2 dots on one side)—so it is like helium Draw the Lewis structures for: H Ca N F ...
Chapter 3 - Stoichiometry
... Calculate the empirical formula mass Divide the known molecular mass by the empirical formula mass deriving a whole number, n Multiply the empirical formula by n to derive the molecular formula ...
... Calculate the empirical formula mass Divide the known molecular mass by the empirical formula mass deriving a whole number, n Multiply the empirical formula by n to derive the molecular formula ...
Atomic Structure Tick Sheet
... I know that all ATOMS are ELECTRICALLY NEUTRAL because they have EQUAL NUMBERS of positive protons and negative electrons so the charges cancel. I know that all atoms of the same element have the SAME number of protons. I know that atoms of DIFFERENT elements have DIFFERENT numbers of protons. I kno ...
... I know that all ATOMS are ELECTRICALLY NEUTRAL because they have EQUAL NUMBERS of positive protons and negative electrons so the charges cancel. I know that all atoms of the same element have the SAME number of protons. I know that atoms of DIFFERENT elements have DIFFERENT numbers of protons. I kno ...
Elements and Atoms
... Atomic Number: Number of protons and it is also the number of electrons in an atom of an element. Element’s Symbol: An abbreviation for the element. Elements Name ...
... Atomic Number: Number of protons and it is also the number of electrons in an atom of an element. Element’s Symbol: An abbreviation for the element. Elements Name ...
Introduction to Chemical Reactions
... number of atoms of each element on each side. The Law of Conservation of Mass says that atoms won’t be created or destroyed in a chemical reaction. That is why you have to balance chemical equations! ...
... number of atoms of each element on each side. The Law of Conservation of Mass says that atoms won’t be created or destroyed in a chemical reaction. That is why you have to balance chemical equations! ...
atomic number
... Atom: smallest unit of an element. Compound: substance made of 2 or more elements. It can only be separated by chemical means. Molecule: smallest unit of a compound. Mixture: A combination of substances that are not chemically combined. Can be separated by physical means. Homogeneous: looks the same ...
... Atom: smallest unit of an element. Compound: substance made of 2 or more elements. It can only be separated by chemical means. Molecule: smallest unit of a compound. Mixture: A combination of substances that are not chemically combined. Can be separated by physical means. Homogeneous: looks the same ...
Chapter 6: Chemical Bonding
... • Bond Length – The distance between two bonded atoms at their minimum potential energy. AKA average distance between two bonded atoms. • Bond Energy – The energy required to break a chemical bond or form neutral isolated atoms. ...
... • Bond Length – The distance between two bonded atoms at their minimum potential energy. AKA average distance between two bonded atoms. • Bond Energy – The energy required to break a chemical bond or form neutral isolated atoms. ...
chem1a_ch02_lecture - Santa Rosa Junior College
... the metal. Many metal names end in -ium. The anion is named by adding the suffix -ide to the root of the nonmetal name. Calcium and bromine form calcium bromide. ...
... the metal. Many metal names end in -ium. The anion is named by adding the suffix -ide to the root of the nonmetal name. Calcium and bromine form calcium bromide. ...
chem1a_ch02_lecture - Santa Rosa Junior College
... the metal. Many metal names end in -ium. The anion is named by adding the suffix -ide to the root of the nonmetal name. Calcium and bromine form calcium bromide. ...
... the metal. Many metal names end in -ium. The anion is named by adding the suffix -ide to the root of the nonmetal name. Calcium and bromine form calcium bromide. ...
chemical bonds - geraldinescience
... Chemical Formulas • A chemical formula is a combination of letters and numbers that shows which elements make up a compound and the number of atoms of each element that are required to make a molecule of a compound. • In a chemical formula, the subscript that appears after the symbol for an element ...
... Chemical Formulas • A chemical formula is a combination of letters and numbers that shows which elements make up a compound and the number of atoms of each element that are required to make a molecule of a compound. • In a chemical formula, the subscript that appears after the symbol for an element ...
The Periodic Table OL Page 1 of 2 G. Galvin Name: Periodic Table
... Defn: The mass number of an element is the sum of the number of protons and neutrons in the nucleus of an atom of that element. No. of neutrons in an atom = Mass Number (A) – Atomic Number (Z) Defn: Isotopes are atoms of the same element (i.e. they have the same atomic number) which have different m ...
... Defn: The mass number of an element is the sum of the number of protons and neutrons in the nucleus of an atom of that element. No. of neutrons in an atom = Mass Number (A) – Atomic Number (Z) Defn: Isotopes are atoms of the same element (i.e. they have the same atomic number) which have different m ...
How do chemists determine the formula of compounds?
... This will contain 28.60 grams of B and 10.60 grams H Determine the number of moles of each Determine the simplest whole number ratio ...
... This will contain 28.60 grams of B and 10.60 grams H Determine the number of moles of each Determine the simplest whole number ratio ...
Empirical Formulas
... Divide the moles of each element by the lowest number of moles of all the elements Round to whole numbers to find ratios UNLESS there is .5, then multiply each result by 2 for whole number ratios ...
... Divide the moles of each element by the lowest number of moles of all the elements Round to whole numbers to find ratios UNLESS there is .5, then multiply each result by 2 for whole number ratios ...
Naming Chemical Compounds
... H1+ ions can be added to any of the “ates”or “ites” with a 2- or 3- charges, reducing the overall charge of the newly formed polyatomic negative ion by one. This is shown ...
... H1+ ions can be added to any of the “ates”or “ites” with a 2- or 3- charges, reducing the overall charge of the newly formed polyatomic negative ion by one. This is shown ...
quiz questions chapters 1
... C) PCl4+ D) CCl3+ E) NH3 Which statement is false concerning ionic bonds and compounds? A) Ionic bonds are a result of electrostatic forces. B) Ionic bonds usually occur between elements with high and low electron affinities. C) Elements of an ionic compound usually carry the same charge. D) Lewis d ...
... C) PCl4+ D) CCl3+ E) NH3 Which statement is false concerning ionic bonds and compounds? A) Ionic bonds are a result of electrostatic forces. B) Ionic bonds usually occur between elements with high and low electron affinities. C) Elements of an ionic compound usually carry the same charge. D) Lewis d ...
First Semester Final - Review Questions
... 4. Describe the gold foil experiment. What was the important discovery in that experiment? 5. Where are the metals, nonmetals, and semimetals on the periodic table? 6. Identify the groups for alkali metals, alkaline earth metals, halogens, and transition metals? 7. Why do elements in the same group ...
... 4. Describe the gold foil experiment. What was the important discovery in that experiment? 5. Where are the metals, nonmetals, and semimetals on the periodic table? 6. Identify the groups for alkali metals, alkaline earth metals, halogens, and transition metals? 7. Why do elements in the same group ...
Properties and Changes in Matter
... up of more than one type of matter acting like a single pure substance. Mixtures are made up of more than one substance in which each part Retains its chemical identity. ...
... up of more than one type of matter acting like a single pure substance. Mixtures are made up of more than one substance in which each part Retains its chemical identity. ...
Chem A Week 2 Matter Notes
... A.Solids– are ____________ matter They have a definite shape and volume matter B. Liquids – are ___________ They take the shape of their container, volume but still have a definite ________________. ...
... A.Solids– are ____________ matter They have a definite shape and volume matter B. Liquids – are ___________ They take the shape of their container, volume but still have a definite ________________. ...