The masses of reactants and products are equal.
... During the 1780s the French chemist Antoine Lavoisier (luh-VWAHzee-ay) showed that matter can never be created or destroyed in a chemical reaction. Lavoisier emphasized the importance of making very careful measurements in his experiments. Because of his methods, he was able to show that reactions t ...
... During the 1780s the French chemist Antoine Lavoisier (luh-VWAHzee-ay) showed that matter can never be created or destroyed in a chemical reaction. Lavoisier emphasized the importance of making very careful measurements in his experiments. Because of his methods, he was able to show that reactions t ...
Chemistry 11 – Course Review
... 5.1-5.4 Describe the sub-atomic structures of atoms, ions, and isotopes, using calculation where appropriate 6.1 Describe the development of the modern periodic table 6.2 Draw conclusions about the similarities and trends in the properties of elements, with reference to the periodic table 6. ...
... 5.1-5.4 Describe the sub-atomic structures of atoms, ions, and isotopes, using calculation where appropriate 6.1 Describe the development of the modern periodic table 6.2 Draw conclusions about the similarities and trends in the properties of elements, with reference to the periodic table 6. ...
Reporting Category 3: Bonding and Chemical Reactions
... If you know the name of an acid, you can write its formula by using the rules for writing the name of an acid, in reverse. You still have to balance the ionic charges just as you would for any ionic compound. That is, check the charges to see if they equal zero. If not, crisscross the numbers. EXAMP ...
... If you know the name of an acid, you can write its formula by using the rules for writing the name of an acid, in reverse. You still have to balance the ionic charges just as you would for any ionic compound. That is, check the charges to see if they equal zero. If not, crisscross the numbers. EXAMP ...
The d- and f- Block Element Block Elements The d- and f
... of the groups 3-12 in which the d orbitals are progressively filled in each of the four long periods. The elements constituting the f -block are those in which the 4 f and 5 f orbitals are progressively filled in the latter two long periods; these elements are formal members of group 3 from which th ...
... of the groups 3-12 in which the d orbitals are progressively filled in each of the four long periods. The elements constituting the f -block are those in which the 4 f and 5 f orbitals are progressively filled in the latter two long periods; these elements are formal members of group 3 from which th ...
BC10TEXTCH05_Sec3
... Organic chemistry is the study of compounds that contain carbon. Well over half of all known compounds are classified as organic. Carbon is an element in group 14 of the periodic table. Carbon has four electrons in its valence shell and forms four covalent bonds. In almost all organic compounds, car ...
... Organic chemistry is the study of compounds that contain carbon. Well over half of all known compounds are classified as organic. Carbon is an element in group 14 of the periodic table. Carbon has four electrons in its valence shell and forms four covalent bonds. In almost all organic compounds, car ...
3. Chemical changes and Structure Unit Questions
... o Group 8- Noble gases o Chemical formula can be written: o From the name if there is a prefix. Di, tri, tetra etc. o Using S,V,S,D,F o The state symbols are: o (s)-solid o (l)- liquid o (g)- gas o (aq)- in solution (dissolved) o The first 20 elements can be separated into the following: o Metallic- ...
... o Group 8- Noble gases o Chemical formula can be written: o From the name if there is a prefix. Di, tri, tetra etc. o Using S,V,S,D,F o The state symbols are: o (s)-solid o (l)- liquid o (g)- gas o (aq)- in solution (dissolved) o The first 20 elements can be separated into the following: o Metallic- ...
A Review of High School Chemistry
... materials and not only came up with the law of multiple proportions, but also a relative ratio of weights of the different elements. For example, they found that by assigning hydrogen, the lightest element, an ATOMIC MASS UNIT of one, the following approximate relative ratios of other elements were: ...
... materials and not only came up with the law of multiple proportions, but also a relative ratio of weights of the different elements. For example, they found that by assigning hydrogen, the lightest element, an ATOMIC MASS UNIT of one, the following approximate relative ratios of other elements were: ...
Chemistry Stoichiometry Standard Set 3 Review
... one mole, or conversely, if one mole of 12C atoms were weighed, it would weigh exactly 12 grams. (Note that carbon, as found in nature, is a mixture of isotopes, including atoms of carbon-12, carbon-13, and trace amounts of carbon-14.) The definition of the mole refers to pure carbon-12. The atomic ...
... one mole, or conversely, if one mole of 12C atoms were weighed, it would weigh exactly 12 grams. (Note that carbon, as found in nature, is a mixture of isotopes, including atoms of carbon-12, carbon-13, and trace amounts of carbon-14.) The definition of the mole refers to pure carbon-12. The atomic ...
FYBSc Revised Syllabus
... and tertiary amines, yielding quaternary ammonium salts; Hoffmann elimination. Note: Each reaction should be studied with respect to compounds with up to six carbon atoms. Based on these and the reactions of alkanes, alkenes and alkynes, multistep synthesis of compounds having one functional group a ...
... and tertiary amines, yielding quaternary ammonium salts; Hoffmann elimination. Note: Each reaction should be studied with respect to compounds with up to six carbon atoms. Based on these and the reactions of alkanes, alkenes and alkynes, multistep synthesis of compounds having one functional group a ...
Molecular and Empirical Formulas
... Compare those against the number of the atoms of the same element on the right side. 3. Determine where to place coefficients in front of formulas so that the left side has the same number of atoms as the right side for EACH element in order to balance the equation. 4. Check your answer to see if: – ...
... Compare those against the number of the atoms of the same element on the right side. 3. Determine where to place coefficients in front of formulas so that the left side has the same number of atoms as the right side for EACH element in order to balance the equation. 4. Check your answer to see if: – ...
Review Questions for 1st year chemistry
... The pressure of a mixture of nitrogen, carbon dioxide, and oxygen is 150 kPa. What is the partial pressure of oxygen if the partial pressure of nitrogen is 100 kPa and that of carbon dioxide is 24 kPa? A. 51 kPa B. 26 kPa C. 35 kPa D. Not enough information is given Answer: B Dalton’s Law of Partia ...
... The pressure of a mixture of nitrogen, carbon dioxide, and oxygen is 150 kPa. What is the partial pressure of oxygen if the partial pressure of nitrogen is 100 kPa and that of carbon dioxide is 24 kPa? A. 51 kPa B. 26 kPa C. 35 kPa D. Not enough information is given Answer: B Dalton’s Law of Partia ...
Name __KEY____________ Per. ______ Polarity and
... Polarity and Stoichiometry Review When examining trends in the periodic table, as we move towards the top-right the elements have a greater _electronegativity_ (atomic radius/ electronegativity), which is a measure of how much they want to _ hold onto_ (hold onto/ let go of) their electrons. For any ...
... Polarity and Stoichiometry Review When examining trends in the periodic table, as we move towards the top-right the elements have a greater _electronegativity_ (atomic radius/ electronegativity), which is a measure of how much they want to _ hold onto_ (hold onto/ let go of) their electrons. For any ...
CHAPTER 8 PERIODIC RELATIONSHIPS AMONG THE ELEMENTS
... table, the ionization energies will continue to increase as we move to P. Continuing across to Cl and moving up the halogen group, F will have a higher ionization energy than P. Finally, Ne is to the right of F in period two, thus it will have a higher ionization energy. The correct order of increas ...
... table, the ionization energies will continue to increase as we move to P. Continuing across to Cl and moving up the halogen group, F will have a higher ionization energy than P. Finally, Ne is to the right of F in period two, thus it will have a higher ionization energy. The correct order of increas ...
topic 3: periodicity
... dip from N to O: oxygen fourth 2p electron goes into the first 2p orbital on which there is already an electron with opposite spin; the resulting repulsion between these two electrons - which is minimised because of their opposite spin - makes it easier to remove that electron. ...
... dip from N to O: oxygen fourth 2p electron goes into the first 2p orbital on which there is already an electron with opposite spin; the resulting repulsion between these two electrons - which is minimised because of their opposite spin - makes it easier to remove that electron. ...
CBSE/12th Class/2010/CHEMISTRY
... steel is produced. Though possible to create at home, the majority of steel is made in enormous batches using heavy machinery. (ii) Zinc oxide into metallic zinc Zinc oxide is converted to metallic zinc by reacting it with coke at 673 K. Coke,673K ZnO + C Zn + CO (iii)The ore rutile (impure titanium ...
... steel is produced. Though possible to create at home, the majority of steel is made in enormous batches using heavy machinery. (ii) Zinc oxide into metallic zinc Zinc oxide is converted to metallic zinc by reacting it with coke at 673 K. Coke,673K ZnO + C Zn + CO (iii)The ore rutile (impure titanium ...
CHEM 1405 Practice Exam #2
... 2) A) Which of the following metals does not react with aqueous Ni (NO3)2? Why? ...
... 2) A) Which of the following metals does not react with aqueous Ni (NO3)2? Why? ...
Chapter 3 Molecules, Compounds, and Chemical Equations
... each atom in the simplest unit of the compound. molecules or ions - each element is represented by its letter symbol. - the number of atoms of each element is written to the right of the element as a subscript. subscript If there is only one atom, the 1 subscript is not written. - polyatomic gro ...
... each atom in the simplest unit of the compound. molecules or ions - each element is represented by its letter symbol. - the number of atoms of each element is written to the right of the element as a subscript. subscript If there is only one atom, the 1 subscript is not written. - polyatomic gro ...
unit 7 h chem notes - chemical equations
... II. Sometimes it is necessary to abbreviate the “phase” of the substance to the lower right of the substance. Some abbreviations are: s = solid, l= liquid, g ( )= gas, aq= aqueous, ppt ( )= precipitate. III Write equations using correct formulas of diatomic molecules, then Balance the equation for e ...
... II. Sometimes it is necessary to abbreviate the “phase” of the substance to the lower right of the substance. Some abbreviations are: s = solid, l= liquid, g ( )= gas, aq= aqueous, ppt ( )= precipitate. III Write equations using correct formulas of diatomic molecules, then Balance the equation for e ...
Chapter 6 Chemical Composition
... 1. To understand the concept of average mass 2. To learn how counting can be done by weighing 3. To understand atomic mass and learn how it is ...
... 1. To understand the concept of average mass 2. To learn how counting can be done by weighing 3. To understand atomic mass and learn how it is ...
Chapter 3 Molecules, Compounds, and Chemical Equations q
... each atom in the simplest unit of the compound. molecules or ions - each element is represented by its letter symbol. - the number of atoms of each element is written to the right of the element as a subscript. If there is only one atom, the 1 subscript is not written. - polyatomic groups are pl ...
... each atom in the simplest unit of the compound. molecules or ions - each element is represented by its letter symbol. - the number of atoms of each element is written to the right of the element as a subscript. If there is only one atom, the 1 subscript is not written. - polyatomic groups are pl ...
Week 2
... • One way to do this was to arrange the elements in a manner that would establish categories of elements having similar physical and chemical properties. • Dimitri Mendeleev published the first successful arrangement, called a periodic table, in 1869. • In its modern form, the periodic table organiz ...
... • One way to do this was to arrange the elements in a manner that would establish categories of elements having similar physical and chemical properties. • Dimitri Mendeleev published the first successful arrangement, called a periodic table, in 1869. • In its modern form, the periodic table organiz ...
Chemistry - Resonance
... proteins, vitamins etc., which are isolated directly or indirectly from living organisms such as animals and plants are called organic compounds.The branch of chemistry which deals with the study of these compounds is called ORGANIC CHEMISTRY. ...
... proteins, vitamins etc., which are isolated directly or indirectly from living organisms such as animals and plants are called organic compounds.The branch of chemistry which deals with the study of these compounds is called ORGANIC CHEMISTRY. ...
Lecture 1 Atomic Structure
... In 1099, Max Planck proposed a revolutionary theory about the nature of light. The theory successfully explained several observations concerning the interaction of light and matter, which could not be explained by the wave theory of light. The theory is called Plank’s quantum theory of light. It sta ...
... In 1099, Max Planck proposed a revolutionary theory about the nature of light. The theory successfully explained several observations concerning the interaction of light and matter, which could not be explained by the wave theory of light. The theory is called Plank’s quantum theory of light. It sta ...
1.9 M - Thierry Karsenti
... 2. Atom: the smallest particle of an element that retains the identify and properties of the element and can take part in a chemical change. 3. Atomic number (symbol Z): the number of protons in the nucleus of each atom. 4. Compound: a substance that is formed when two or more elements combine chemi ...
... 2. Atom: the smallest particle of an element that retains the identify and properties of the element and can take part in a chemical change. 3. Atomic number (symbol Z): the number of protons in the nucleus of each atom. 4. Compound: a substance that is formed when two or more elements combine chemi ...
High School Knowledge Exam – Study Guide
... -Left side = metallic (ionic bonds with nonmetals), base-forming properties -Right side = non-metallic (covalent bonds with other nonmetals -Atomic radii decrease left to right (due to increasing number of protons to attract electrons yet no change in number of energy levels) -Atomic radii increase ...
... -Left side = metallic (ionic bonds with nonmetals), base-forming properties -Right side = non-metallic (covalent bonds with other nonmetals -Atomic radii decrease left to right (due to increasing number of protons to attract electrons yet no change in number of energy levels) -Atomic radii increase ...