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Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Nitrogen, Atomic Number, Phosphorus, Periodic Table, Electronic Configuration Of Nitrogen, Electronic Configuration Of Phosphorus
An atom has electronic configuration 2, 8, 7. (a) What is the atomic number of this element?
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Atom, Electronic Configuration, Atomic Number, Number Of Valence Electrons, Valence Electrons, Electronic Configuration In Chemistry
What property do all elements in the same column of the Periodic Table as boron have in common?
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Periodic Table, Electrons, Electronic Configuration, Valence Shell, Boron, Outermost Orbit, Fluorine
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium?
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Modern Periodic Table, Atomic Numbers, Chemical Properties, Physical And Chemical Properties, Resembling Calcium, Atomic Number Of Calcium, Electronic Configuration Of Calcium, Chemical Properties, Valence Electrons
The position of three elements A, B and C in the Periodic Table are shown below:
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Periodic Table, Non-metal, Metals, Periodic Table of Elements, Periodic Table in Chemistry, History of Periodic Table
By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic? Ga, Ge, As, Se, Be
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Periodic Table, Maximum Metallic Characteristic, Beryllium, Periodic Table Properties, Periodic Table In Chemistry
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Electronic Configuration, Atom, Modern Periodic Table, Periodic Table, Number Of Electrons, Electrons, Valence Shell
Which of the following statements is not a correct statement about the trends when going from left to right across the periods of Periodic Table?
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Periodic Table, Periods Of Periodic Table, Metallic, Valence Electrons, Atoms, Electrons, Oxides
Which element has (a) two shells, both of which are completely filled with electrons?
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Electrons, Electronic Configuration, Valence Shell, Neon, Magnesium, Silicon, Boron, Carbon
Element X forms a chloride with the formula XCl₂, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as
Science [10], Science - Periodic Classification of Elements, Central Board of Secondary Education 1/9/2010
Chloride, High Melting Point, Periodic Table, Magnisium, Silicon, Aluminium, Nitrogen, Periodic Table In Chemistry, Chemistry Periodic Table