5073 Chemistry IGCSE ordinary level for 2016
... 440 BC, the Greek Leucippus and his pupil Democritus coined the term atomos to describe the smallest particle of matter. It translates to mean something that is indivisible. In the eighteenth century, chemist, John Dalton, revived the term when he suggested that each element was made up of unique at ...
... 440 BC, the Greek Leucippus and his pupil Democritus coined the term atomos to describe the smallest particle of matter. It translates to mean something that is indivisible. In the eighteenth century, chemist, John Dalton, revived the term when he suggested that each element was made up of unique at ...
1 What is the angular momentum quantum number (l) value for the
... of all free radicals? They all: A have an unpaired electron. CORRECT: All free radicals, by definition, have one or more unpaired electrons. It is this characteristic that typically makes free radicals highly reactive. B are neutral atoms. INCORRECT: Free radicals can be molecular species and can ...
... of all free radicals? They all: A have an unpaired electron. CORRECT: All free radicals, by definition, have one or more unpaired electrons. It is this characteristic that typically makes free radicals highly reactive. B are neutral atoms. INCORRECT: Free radicals can be molecular species and can ...
CHEM 1405 Practice Exam #2
... A) Solid sodium carbonate is heated to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to sodium oxide and carbon dioxide. C) Sodium carbonate decomposes to sodium oxide and carbon dioxide gas. D) Sodium carbonate is heated to give sodium oxide and carbon dioxide. 20) ...
... A) Solid sodium carbonate is heated to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to sodium oxide and carbon dioxide. C) Sodium carbonate decomposes to sodium oxide and carbon dioxide gas. D) Sodium carbonate is heated to give sodium oxide and carbon dioxide. 20) ...
PREPARATIONS AND APPLICATION OF METAL NANOPARTICLES
... Polymer in solid state or resin supports might have different properties in comparison to the conventional support such as alumina, titania, silica, etc. The particles are inside polymer matrix, and not simply on the surface of the support particles as is common case in the inorganic support. The pa ...
... Polymer in solid state or resin supports might have different properties in comparison to the conventional support such as alumina, titania, silica, etc. The particles are inside polymer matrix, and not simply on the surface of the support particles as is common case in the inorganic support. The pa ...
compound having protonated forms of ethylenediaminetetraacetate
... The compound (AdeH2)[Cu(HEDTA)(H2O)] ×/2H2O was studied by TG analysis (with FT-IR study of the evolved gasses), IR, electronic and ESR spectra, magnetic susceptibility data, and single crystal X-ray diffraction methods (monoclinic system, space group P 21/c (a /7.053(1), b /42.540(5), c /7.798(1 ...
... The compound (AdeH2)[Cu(HEDTA)(H2O)] ×/2H2O was studied by TG analysis (with FT-IR study of the evolved gasses), IR, electronic and ESR spectra, magnetic susceptibility data, and single crystal X-ray diffraction methods (monoclinic system, space group P 21/c (a /7.053(1), b /42.540(5), c /7.798(1 ...
Notes for Quarter I
... refraction in a number of ways; for example, a straw in a glass of water appears bent because light is moving from the medium of air to water (see also Fig. 6, p. 648). White light passing through a prism can be separated into its component colors because of refraction also (Fig. 7, p. 648). Diffra ...
... refraction in a number of ways; for example, a straw in a glass of water appears bent because light is moving from the medium of air to water (see also Fig. 6, p. 648). White light passing through a prism can be separated into its component colors because of refraction also (Fig. 7, p. 648). Diffra ...
chemistry
... prediction. If you read a description of matter which indicates that it is a solid, nonmetallic molecular compound, then (by the end of this textbook at least) you will have a good idea of its properties in general. There are many different classification systems used, some linked together, others s ...
... prediction. If you read a description of matter which indicates that it is a solid, nonmetallic molecular compound, then (by the end of this textbook at least) you will have a good idea of its properties in general. There are many different classification systems used, some linked together, others s ...
CHEMISTRY
... 1. Begin by getting the students to organize their problems. Have them write down what they know, what they need to know, and any formulas that may help. Sometimes a problem may have numbers or other information that is not important for a calculation. Help the students discern what is and what is n ...
... 1. Begin by getting the students to organize their problems. Have them write down what they know, what they need to know, and any formulas that may help. Sometimes a problem may have numbers or other information that is not important for a calculation. Help the students discern what is and what is n ...
Topic 9 - Anderson High School
... • Negative chloride ions are attracted to the positive ions. There they lose electrons and are oxidized to chlorine gas: 2Cl-(l) → Cl2(g) + 2e• Positive sodium ions are attracted to the negative cathode. They gain electrons and are reduced to sodium metal: ...
... • Negative chloride ions are attracted to the positive ions. There they lose electrons and are oxidized to chlorine gas: 2Cl-(l) → Cl2(g) + 2e• Positive sodium ions are attracted to the negative cathode. They gain electrons and are reduced to sodium metal: ...
PHYSICAL SETTING CHEMISTRY
... 2.3 × 1014 hertz. Using your graph, estimate the energy associated with this spectral line. [1] 68 Explain, in terms of subatomic particles and energy states, why light is emitted by the hydrogen gas. [1] 69 Identify one condition not mentioned in the passage, under which hydrogen gas behaves most l ...
... 2.3 × 1014 hertz. Using your graph, estimate the energy associated with this spectral line. [1] 68 Explain, in terms of subatomic particles and energy states, why light is emitted by the hydrogen gas. [1] 69 Identify one condition not mentioned in the passage, under which hydrogen gas behaves most l ...
1b-Redox FIB notes and practice
... This compound of sodium chloride consists of Na1+ ions and Cl1- ions. Thus, the oxidation number of sodium is +1 and of chlorine is -1. Notice that when writing oxidation numbers, the sign is put before the number. Sodium has an ionic charge of 1+ and an oxidation number of +1. In calcium fluoride, ...
... This compound of sodium chloride consists of Na1+ ions and Cl1- ions. Thus, the oxidation number of sodium is +1 and of chlorine is -1. Notice that when writing oxidation numbers, the sign is put before the number. Sodium has an ionic charge of 1+ and an oxidation number of +1. In calcium fluoride, ...
CHM2045 Exam 2 Review Questions Fall 2015
... water (4.184 J/g°C) and no heat loss to the bowl, which choice is closest to the number of photons absorbed? ...
... water (4.184 J/g°C) and no heat loss to the bowl, which choice is closest to the number of photons absorbed? ...
WORD - SSS Chemistry
... The Greek who developed the idea of atoms was _______________________________ Consider the following ideas: Compounds are made up of molecules which are combinations of atoms All atoms of an element are the same Atoms of different elements are different Atoms are indivisible particles Who ca ...
... The Greek who developed the idea of atoms was _______________________________ Consider the following ideas: Compounds are made up of molecules which are combinations of atoms All atoms of an element are the same Atoms of different elements are different Atoms are indivisible particles Who ca ...
The Effect of Using Computer Simulations in Teaching Chemical
... a separate subject. For over a decade, learners have performed poorly in chemistry in the Uganda Certificate of Education (UCE), also called ‘O-level’ examination (Ministry of Education and Sports 2006). The poor performance may partly be due to the manner in which chemistry is taught. Many learners ...
... a separate subject. For over a decade, learners have performed poorly in chemistry in the Uganda Certificate of Education (UCE), also called ‘O-level’ examination (Ministry of Education and Sports 2006). The poor performance may partly be due to the manner in which chemistry is taught. Many learners ...
Basic Agricultural Chemistry - Macmillan Education South Africa
... A gas (vapour) has no fixed volume or shape, and so it conforms to the volume and shape of its container. A gas can be compressed to occupy a smaller volume, or it can expand to occupy a larger one. The particles in a gas state of matter have very high kinetic energy and will move about very rapidly ...
... A gas (vapour) has no fixed volume or shape, and so it conforms to the volume and shape of its container. A gas can be compressed to occupy a smaller volume, or it can expand to occupy a larger one. The particles in a gas state of matter have very high kinetic energy and will move about very rapidly ...
Ch 8 Lecture Notes
... Balance hydrogen by adding (a) H+ in acidic solutions, (b) in basic solutions, continue as if in acidic solution, but at the end each H + ion will be neutralized by adding OH- ions 6. Balance charge by adding electrons; for the oxidation half-reaction, the electrons will be on the right, for the red ...
... Balance hydrogen by adding (a) H+ in acidic solutions, (b) in basic solutions, continue as if in acidic solution, but at the end each H + ion will be neutralized by adding OH- ions 6. Balance charge by adding electrons; for the oxidation half-reaction, the electrons will be on the right, for the red ...
support material
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and other properties ...
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and other properties ...
Metal disordering Cu(II) supramolecular polymers constructed from
... five metal sites, four are still disordered with the occupancy of 50%, and only Cu1 coordinated to the fixed pyridine molecules is fully occupied. Consequently, the whole structure also depends on the arrangement of the metal centers and several potential arrangements of the metal centers may exist, ...
... five metal sites, four are still disordered with the occupancy of 50%, and only Cu1 coordinated to the fixed pyridine molecules is fully occupied. Consequently, the whole structure also depends on the arrangement of the metal centers and several potential arrangements of the metal centers may exist, ...
Final Exam Review Packet
... 6. The advantage of using moles is that the quantity will be much smaller and a number that is easier to deal with than if you use grams or pounds. Also, you can compare two quantities of moles to each other, but you cannot compare grams and pounds. 7. Hydrates are compounds formed by the union of w ...
... 6. The advantage of using moles is that the quantity will be much smaller and a number that is easier to deal with than if you use grams or pounds. Also, you can compare two quantities of moles to each other, but you cannot compare grams and pounds. 7. Hydrates are compounds formed by the union of w ...
Science
... 1. Students shall understand the historical development of the model of the atom. 2. Student shall understand the structure of the atom. 3. Students shall understand how the arrangement of electrons in atoms relates to the quantum model. Periodicity 4. Students shall understand the significance of t ...
... 1. Students shall understand the historical development of the model of the atom. 2. Student shall understand the structure of the atom. 3. Students shall understand how the arrangement of electrons in atoms relates to the quantum model. Periodicity 4. Students shall understand the significance of t ...
Differentiated Chemistry Worksheet and Laboratory
... Short Answer. Answer the following questions. We spend quite a bit of time staring at the red and green lights in a traffic signals. While that image is in your mind, for questions 92 – 95, decide which would have the following for a red light with a 4.41 x 1014 Hz frequency or a green light with a ...
... Short Answer. Answer the following questions. We spend quite a bit of time staring at the red and green lights in a traffic signals. While that image is in your mind, for questions 92 – 95, decide which would have the following for a red light with a 4.41 x 1014 Hz frequency or a green light with a ...