Document
... 1. Graph on graph paper, the trend of first ionization energy (potential). The graph should have the atomic number on the x-axis and ionization energy on the y-axis. Label element symbols at the peaks and valleys. 2. Answer the questions below about this graph and what conclusions you would draw. Qu ...
... 1. Graph on graph paper, the trend of first ionization energy (potential). The graph should have the atomic number on the x-axis and ionization energy on the y-axis. Label element symbols at the peaks and valleys. 2. Answer the questions below about this graph and what conclusions you would draw. Qu ...
Periodicity
... elements with the most similar properties were side by side. He left empty spaces for elements that had not yet been discovered. Later those elements were found to fit right in the spaces of Mendeleev’s table. In 1913, Henry Moseley (1887-1915), a British physicist, determined the nuclear charge (at ...
... elements with the most similar properties were side by side. He left empty spaces for elements that had not yet been discovered. Later those elements were found to fit right in the spaces of Mendeleev’s table. In 1913, Henry Moseley (1887-1915), a British physicist, determined the nuclear charge (at ...
Periodic Law
... Squares in the Periodic Table The background colors in the squares are used to distinguish groups of elements. Group I elements are called alkali metals. Group 2 elements are called alkaline earth metals. The nonmetals of Group 17 are called halogens. Group 18 elements are called Noble Gases Groups ...
... Squares in the Periodic Table The background colors in the squares are used to distinguish groups of elements. Group I elements are called alkali metals. Group 2 elements are called alkaline earth metals. The nonmetals of Group 17 are called halogens. Group 18 elements are called Noble Gases Groups ...
unit-8-ppt-3-metalsnon-metalsie-and-size-of-atom
... VIII.2 THE PERIODIC TABLE 3. The size of the elements radius decreases going across a row and increases going down a family ...
... VIII.2 THE PERIODIC TABLE 3. The size of the elements radius decreases going across a row and increases going down a family ...
chemistry, grade 11, university preparation, sch3u
... Call the teacher. Pour lots of cold water gently into the victim’s eye. Putting him or her on the floor is best—never mind the mess. It is very dangerous to use a microscope where there is direct sunlight shining. If sunlight is accidentally reflected up through the microscope your eye could be perm ...
... Call the teacher. Pour lots of cold water gently into the victim’s eye. Putting him or her on the floor is best—never mind the mess. It is very dangerous to use a microscope where there is direct sunlight shining. If sunlight is accidentally reflected up through the microscope your eye could be perm ...
Chapter 5: Electrons
... attracts electrons in the same energy level. Therefore, it is tougher to remove an electron from an atom. Increasing nuclear charge is responsible for both an increasing ionization energy and decreasing atomic radius across a period. ...
... attracts electrons in the same energy level. Therefore, it is tougher to remove an electron from an atom. Increasing nuclear charge is responsible for both an increasing ionization energy and decreasing atomic radius across a period. ...
Chapter 6 Reading Guide
... 6. What are the two reasons Mendeleev gets more credit than Meyer for the periodic table? 7. What approach did Mendelleev take to organizing the elements? 8. How did he eventually organize the elements? 9. What were the question marks on Mendeleev’s table? 10. How did he know to leave spaces? 11. Wh ...
... 6. What are the two reasons Mendeleev gets more credit than Meyer for the periodic table? 7. What approach did Mendelleev take to organizing the elements? 8. How did he eventually organize the elements? 9. What were the question marks on Mendeleev’s table? 10. How did he know to leave spaces? 11. Wh ...
Chapter 1 - Study Guide Solutions
... Group 1 - ALKALI METALS (Li, Na, K, Rb, Cs, Fr) Soft, low melting, shiny metals: conduct heat and electricity. They are stored in oil due to their high reactivity (also named oily metals). ...
... Group 1 - ALKALI METALS (Li, Na, K, Rb, Cs, Fr) Soft, low melting, shiny metals: conduct heat and electricity. They are stored in oil due to their high reactivity (also named oily metals). ...
Lecture 10
... •An element’s enthalpy of electronic attraction (ΔEAH) is the enthalpy change when a neutral atom in the gas phase acquires an extra electron in the lowest energy orbital available: •These values are negative for most elements, so an ‘increase’ in the ΔEAH is represented by a more negative number. A ...
... •An element’s enthalpy of electronic attraction (ΔEAH) is the enthalpy change when a neutral atom in the gas phase acquires an extra electron in the lowest energy orbital available: •These values are negative for most elements, so an ‘increase’ in the ΔEAH is represented by a more negative number. A ...
UNIT VIII - St John Brebeuf
... VIII.2 THE PERIODIC TABLE 3. The size of the elements radius decreases going across a row and increases going down a family ...
... VIII.2 THE PERIODIC TABLE 3. The size of the elements radius decreases going across a row and increases going down a family ...
CHEM121 Lecture Ch2-3
... Elements and Symbols • Elements: – primary substances from which all other things are built. – Cannot be broken down into simpler substances ...
... Elements and Symbols • Elements: – primary substances from which all other things are built. – Cannot be broken down into simpler substances ...
TEST-Periodic Table
... STA: MS.PS.3.b 16. ANS: A PTS: 1 DIF: L1 OBJ: 5.3.1 Relate the number of valence electrons to groups in the periodic table and to properties of elements in those groups. STA: MS.PS.3.b 17. ANS: B PTS: 1 DIF: L1 OBJ: 5.3.1 Relate the number of valence electrons to groups in the periodic table and to ...
... STA: MS.PS.3.b 16. ANS: A PTS: 1 DIF: L1 OBJ: 5.3.1 Relate the number of valence electrons to groups in the periodic table and to properties of elements in those groups. STA: MS.PS.3.b 17. ANS: B PTS: 1 DIF: L1 OBJ: 5.3.1 Relate the number of valence electrons to groups in the periodic table and to ...
Questions on Chapter 7
... 69) This element is more reactive than lithium and magnesium but less reactive than potassium. This element is __________. A) Na B) Rb C) Ca D) Be E) Fr 70) Which one of the following is not true about the alkali metals? A) They are low density solids at room temperature. B) They all readily form i ...
... 69) This element is more reactive than lithium and magnesium but less reactive than potassium. This element is __________. A) Na B) Rb C) Ca D) Be E) Fr 70) Which one of the following is not true about the alkali metals? A) They are low density solids at room temperature. B) They all readily form i ...
Element Project - Dover Bay
... 4. What are the names of all the elements located in the same group/family (columns) as your element? _____________________________________________________________________ 5. Is your element a metal, metalloid or nonmetal:_______________________________________ 6. Describe the physical properties of ...
... 4. What are the names of all the elements located in the same group/family (columns) as your element? _____________________________________________________________________ 5. Is your element a metal, metalloid or nonmetal:_______________________________________ 6. Describe the physical properties of ...
The Periodic Table Notes
... ____________________________ are responsible for giving groups of elements similar properties. ...
... ____________________________ are responsible for giving groups of elements similar properties. ...
UNIT 5 RECOVERED
... Trends in Electronegativity • Electronegativity generally decreases as you move down a group. • Electronegativity of the representative elements (Group A elements/not transition) increases as you move across a period. ...
... Trends in Electronegativity • Electronegativity generally decreases as you move down a group. • Electronegativity of the representative elements (Group A elements/not transition) increases as you move across a period. ...
Document
... group from Li to Cs, therefore, the reactivity of alkali metal increases from Li to Cs. All the elements are highly electropositive giving +1 ions. Because of the very high second ionisation energies of these elements, their oxidation state in compounds never exceeds +1. On the other hand , alkaline ...
... group from Li to Cs, therefore, the reactivity of alkali metal increases from Li to Cs. All the elements are highly electropositive giving +1 ions. Because of the very high second ionisation energies of these elements, their oxidation state in compounds never exceeds +1. On the other hand , alkaline ...
Chemistry: Matter and Change
... Development of the Periodic Table (cont.) • Meyer and Mendeleev both demonstrated a connection between atomic mass and elemental properties. • Moseley rearranged the table by increasing atomic number, and resulted in a clear periodic pattern. • Periodic repetition of chemical and physical propertie ...
... Development of the Periodic Table (cont.) • Meyer and Mendeleev both demonstrated a connection between atomic mass and elemental properties. • Moseley rearranged the table by increasing atomic number, and resulted in a clear periodic pattern. • Periodic repetition of chemical and physical propertie ...
unit iv – the periodic table
... elements. Properties of the elements repeat in an orderly way. Such a repeating pattern is "periodic" ...
... elements. Properties of the elements repeat in an orderly way. Such a repeating pattern is "periodic" ...
Chapter 5
... Electron Affinity - the energy change associated with the addition of an electron Affinity tends to increase across a period Affinity tends to decrease down a group Electrons farther from the nucleus experience less nuclear attraction Some irregularities due to repulsive forces in the relatively sm ...
... Electron Affinity - the energy change associated with the addition of an electron Affinity tends to increase across a period Affinity tends to decrease down a group Electrons farther from the nucleus experience less nuclear attraction Some irregularities due to repulsive forces in the relatively sm ...
Topic 3 - periodicity
... atomic radius is measured as half the distance between two bonded atoms. For this reason noble gases are given no value as they do not bond with other atoms. On descending a group, the atomic radius increase. This is because the outer electrons are getting further from the nucleus. This applies for ...
... atomic radius is measured as half the distance between two bonded atoms. For this reason noble gases are given no value as they do not bond with other atoms. On descending a group, the atomic radius increase. This is because the outer electrons are getting further from the nucleus. This applies for ...
The Periodic Table - Ms. Simmons
... Mendeleev’s Contribution Mendeleev developed Periodic Law (Modern) Periodic Law: the elements, when listed in order of their atomic numbers, fall into recurring groups, so that elements with similar properties occur at regular intervals Periodic law is observed by all members of a column having the ...
... Mendeleev’s Contribution Mendeleev developed Periodic Law (Modern) Periodic Law: the elements, when listed in order of their atomic numbers, fall into recurring groups, so that elements with similar properties occur at regular intervals Periodic law is observed by all members of a column having the ...
Safety First I can… o Follow safe laboratory practices o Identify lab
... burns, much like sunburn, in large doses over short amounts of time.”* state that since alpha particles are the most easily stopped, they are the least dangerous. Gamma radiation is more penetrating, but interacts with matter less frequently. Explain that even though radioactivity can damage tissue, ...
... burns, much like sunburn, in large doses over short amounts of time.”* state that since alpha particles are the most easily stopped, they are the least dangerous. Gamma radiation is more penetrating, but interacts with matter less frequently. Explain that even though radioactivity can damage tissue, ...
Trends in The Periodic Table OL Page 1 of 3 G. Galvin Name
... Any other Alkali Metal can replace the Potassium in this reaction. Page 2 of 3 ...
... Any other Alkali Metal can replace the Potassium in this reaction. Page 2 of 3 ...