(MDCAT) 2017 - University Of Health Sciences Lahore
... h) Describe intermolecular forces (Van der Waal’s forces), based on permanent and induced dipoles, as in HCl, CHCl3, Halogens and in liquid noble gases. i) Describe metallic bonding in terms of positive ions surrounded by mobile electrons (sea of electrons). j) Describe, interpret and/or predict the ...
... h) Describe intermolecular forces (Van der Waal’s forces), based on permanent and induced dipoles, as in HCl, CHCl3, Halogens and in liquid noble gases. i) Describe metallic bonding in terms of positive ions surrounded by mobile electrons (sea of electrons). j) Describe, interpret and/or predict the ...
Ions
... Nonmetals, Group 5A (15), Group 6A (16), and Group 7A (17) • have high ionization energies, they don’t tend to lose electrons but instead gain electrons • readily gain one or more valence electrons to form ions with a negative charge. • gain electrons until they have the same number of valence elect ...
... Nonmetals, Group 5A (15), Group 6A (16), and Group 7A (17) • have high ionization energies, they don’t tend to lose electrons but instead gain electrons • readily gain one or more valence electrons to form ions with a negative charge. • gain electrons until they have the same number of valence elect ...
Chapter 6 Ionic and Molecular Compounds
... • What do they have in common that could be the cause of this lack of reactivity? • Examination of their electron configurations reveals that the noble gases either have 1. an outermost electron energy level that is completely filled with electrons (He = 2 e- in the 1st energy level, Ne = 8 e- in th ...
... • What do they have in common that could be the cause of this lack of reactivity? • Examination of their electron configurations reveals that the noble gases either have 1. an outermost electron energy level that is completely filled with electrons (He = 2 e- in the 1st energy level, Ne = 8 e- in th ...
Oxidation numbers
... The oxidation number of carbon in the products is 0 and in the reactants it is +4 The oxidation number has increased (become more positive). The oxidation number of oxygen in the products is 0 and in the reactants it is −2 The oxidation number has decreased (become more negative). 2. In the compound ...
... The oxidation number of carbon in the products is 0 and in the reactants it is +4 The oxidation number has increased (become more positive). The oxidation number of oxygen in the products is 0 and in the reactants it is −2 The oxidation number has decreased (become more negative). 2. In the compound ...
Tests
... Matter is anything that has ___________ and takes up space. A _______________ would study the structure of the hemoglobin molecule and how it transports oxygen. An organic chemistry works mainly with ____________ compounds. The ____________ chemist would be interested in the analysis of rubies. ____ ...
... Matter is anything that has ___________ and takes up space. A _______________ would study the structure of the hemoglobin molecule and how it transports oxygen. An organic chemistry works mainly with ____________ compounds. The ____________ chemist would be interested in the analysis of rubies. ____ ...
Chapter 19
... equation represents the redox reaction used to manufacture ammonia (NH 3). N 2(g) + 3H 2(g) → 2NH 3(g) This process involves neither ions nor any obvious transfer of electrons. The reactants and products are all molecular compounds. Yet, it is still a redox reaction in which nitrogen is the oxidizin ...
... equation represents the redox reaction used to manufacture ammonia (NH 3). N 2(g) + 3H 2(g) → 2NH 3(g) This process involves neither ions nor any obvious transfer of electrons. The reactants and products are all molecular compounds. Yet, it is still a redox reaction in which nitrogen is the oxidizin ...
Chemistry 101L
... will be making. Remember to include room for multiple trials and average values, if appropriate. If appropriate, have room for classmates’ data. Now organize your list into things that are similar or data that should be compared. Tables columns/rows do not have to be listed in the same order that th ...
... will be making. Remember to include room for multiple trials and average values, if appropriate. If appropriate, have room for classmates’ data. Now organize your list into things that are similar or data that should be compared. Tables columns/rows do not have to be listed in the same order that th ...
Class-XII, Summer assignment
... 1. Though nitrogen exhibits +5 oxidation state, it does not form pentahalide. Give reason. Ans: Nitrogen valence electronic configuration ns2np3 due to absence of empty d- orbitals, it can not extend its valence to 5. 2. PH3 has lower boiling point than NH3. Why? Ans: Unlike NH3, PH3 molecules are n ...
... 1. Though nitrogen exhibits +5 oxidation state, it does not form pentahalide. Give reason. Ans: Nitrogen valence electronic configuration ns2np3 due to absence of empty d- orbitals, it can not extend its valence to 5. 2. PH3 has lower boiling point than NH3. Why? Ans: Unlike NH3, PH3 molecules are n ...
c00kieee - Ritter Illustration
... suffer irreversible damage in a relatively short time. The best example of this can be found in crystals of Am compounds. ...
... suffer irreversible damage in a relatively short time. The best example of this can be found in crystals of Am compounds. ...
2 Atoms and Molecules
... for the atom. Atomic numbers are represented by the symbol Z. All atoms of a specific element must have the same atomic number. The atomic numbers for each element are the numbers above the elemental symbols of the periodic table inside the front cover of this book. Remember, this is also the number ...
... for the atom. Atomic numbers are represented by the symbol Z. All atoms of a specific element must have the same atomic number. The atomic numbers for each element are the numbers above the elemental symbols of the periodic table inside the front cover of this book. Remember, this is also the number ...
Brilliant Preparatory Section, Sitamarhi
... Eg. Consider the following reaction 2 H2 + O2 → 2H2O In this reaction one molecule of oxygen reacts with two molecules of hydrogen. So it would be desirable to take the molecules of H2 and oxygen in the ratio 2:1, so that the reactants are completely consumed during the reaction. But atoms and mole ...
... Eg. Consider the following reaction 2 H2 + O2 → 2H2O In this reaction one molecule of oxygen reacts with two molecules of hydrogen. So it would be desirable to take the molecules of H2 and oxygen in the ratio 2:1, so that the reactants are completely consumed during the reaction. But atoms and mole ...
Chemistry Review 2 answer key
... must equal 0, the oxidation number of the nitrogen must be +2. 'see explanation below' 23. Base your answer on the information below. Aluminum is one of the most abundant metals in Earth's crust. The aluminum compound found in bauxite ore is Al2O3. Over one hundred years ago, it was difficult and ex ...
... must equal 0, the oxidation number of the nitrogen must be +2. 'see explanation below' 23. Base your answer on the information below. Aluminum is one of the most abundant metals in Earth's crust. The aluminum compound found in bauxite ore is Al2O3. Over one hundred years ago, it was difficult and ex ...
Principles of Chemistry 1 and 2 Notes
... A theory that explains the existence of the single, double, and triple bonds. On the other hand, VSEPR model does not distinguish between single, double, and triple bonds. It treats all bonds equally, which reflects the major disadvantage of this model. - Valence bond theory is based on the hybridiz ...
... A theory that explains the existence of the single, double, and triple bonds. On the other hand, VSEPR model does not distinguish between single, double, and triple bonds. It treats all bonds equally, which reflects the major disadvantage of this model. - Valence bond theory is based on the hybridiz ...
Homework extension
... There is reasonable accuracy that are oxidised and reduced. The spelling, punctuation in spelling, punctuation and The answer shows almost and grammar are very grammar, although there may faultless spelling, punctuation weak. still be some errors and grammar. Examples of chemistry points made in the ...
... There is reasonable accuracy that are oxidised and reduced. The spelling, punctuation in spelling, punctuation and The answer shows almost and grammar are very grammar, although there may faultless spelling, punctuation weak. still be some errors and grammar. Examples of chemistry points made in the ...
Topic 9 Reduction and Oxidation File
... Electrolysis: Passage of electric current through an electrolyte. Amount of discharge is affected by: 1) current; 2) charge on ion, 3) duration of electrolysis. Electrolyte: A substance which does not conduct electricity when solid, but does when molten or in aqueous solution and is chemically decom ...
... Electrolysis: Passage of electric current through an electrolyte. Amount of discharge is affected by: 1) current; 2) charge on ion, 3) duration of electrolysis. Electrolyte: A substance which does not conduct electricity when solid, but does when molten or in aqueous solution and is chemically decom ...
Examiners` Report November 2012 GCSE Chemistry
... The last two questions each contained an extended writing part worth 6 marks. Candidates should be familiar with the format of the paper having previously taken other examinations in Science and Additional Science. Many candidates would have been prepared for this examination by the use of the previ ...
... The last two questions each contained an extended writing part worth 6 marks. Candidates should be familiar with the format of the paper having previously taken other examinations in Science and Additional Science. Many candidates would have been prepared for this examination by the use of the previ ...
AP Chemistry Notes and Worksheets 2014
... covalent bonds-created when two or more nonmetals share electrons molecule- atoms held together by covalent bonds ions- charged particles formed by the loss or gain of electrons ionic bonds- compounds created when one atom loses an electron and another gains it; are held together by electros ...
... covalent bonds-created when two or more nonmetals share electrons molecule- atoms held together by covalent bonds ions- charged particles formed by the loss or gain of electrons ionic bonds- compounds created when one atom loses an electron and another gains it; are held together by electros ...
4) What is the term for the procedure of collecting data and recording
... B) chemical change C) molecular change D) physical change E) none of the above What is the term for the symbolic representation of a compound that indicates the number of atoms of each element in the compound? A) atomic number B) atomic notation C) chemical formula D) chemical symbol E) none of the ...
... B) chemical change C) molecular change D) physical change E) none of the above What is the term for the symbolic representation of a compound that indicates the number of atoms of each element in the compound? A) atomic number B) atomic notation C) chemical formula D) chemical symbol E) none of the ...
A* PLC Legacy GCSE Chemistry (all boards)
... There is reasonable accuracy that are oxidised and reduced. The spelling, punctuation in spelling, punctuation and The answer shows almost and grammar are very grammar, although there may faultless spelling, punctuation weak. still be some errors and grammar. Examples of chemistry points made in the ...
... There is reasonable accuracy that are oxidised and reduced. The spelling, punctuation in spelling, punctuation and The answer shows almost and grammar are very grammar, although there may faultless spelling, punctuation weak. still be some errors and grammar. Examples of chemistry points made in the ...
Topic 1: Quantitative chemistry (12
... transitions between different energy levels and recognize that the lines in a line spectrum are directly related to these differences. An understanding of convergence is expected. Series should be considered in the ultraviolet, visible and infrared regions of the spectrum. Calculations, knowledge of ...
... transitions between different energy levels and recognize that the lines in a line spectrum are directly related to these differences. An understanding of convergence is expected. Series should be considered in the ultraviolet, visible and infrared regions of the spectrum. Calculations, knowledge of ...
Topic 1: Quantitative chemistry (12
... transitions between different energy levels and recognize that the lines in a line spectrum are directly related to these differences. An understanding of convergence is expected. Series should be considered in the ultraviolet, visible and infrared regions of the spectrum. Calculations, knowledge of ...
... transitions between different energy levels and recognize that the lines in a line spectrum are directly related to these differences. An understanding of convergence is expected. Series should be considered in the ultraviolet, visible and infrared regions of the spectrum. Calculations, knowledge of ...
Liquid chromatography: a tool for the analysis of metal species
... (iv) multidimensional and multimode chromatography. Multidimensional and multimode chromatography involve, respectively: (i) the use of two different mechanisms (e.g. ion-exchange coupled with ionexclusion); (ii) the use of two or more columns, switching the total flux or a portion of eluate from on ...
... (iv) multidimensional and multimode chromatography. Multidimensional and multimode chromatography involve, respectively: (i) the use of two different mechanisms (e.g. ion-exchange coupled with ionexclusion); (ii) the use of two or more columns, switching the total flux or a portion of eluate from on ...
chemistry - My Study materials – Kumar
... Law of Constant Proportion states that a chemical compound always contains exactly the same proportion of elements by mass. This law is also known as Law of definite proportions. Joseph Louis Proust gave this law hence, this law is also known as Proust’s Law. Explanation of the law:Compounds are for ...
... Law of Constant Proportion states that a chemical compound always contains exactly the same proportion of elements by mass. This law is also known as Law of definite proportions. Joseph Louis Proust gave this law hence, this law is also known as Proust’s Law. Explanation of the law:Compounds are for ...
Chapter 3 Mass Relationships in Chemical Reactions
... 29. The molecular formula of aspirin is C9H8O4. How many aspirin molecules are present in one 500-milligram tablet? A. B. C. D. E. ...
... 29. The molecular formula of aspirin is C9H8O4. How many aspirin molecules are present in one 500-milligram tablet? A. B. C. D. E. ...