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प्रश्न
Classify the following elements into Metals and Nonmetals.
S, Mg, Al, P, N, Na.
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उत्तर
- S- Nonmetal
- Mg- Metal
- Al- Metal
- P- Nonmetal
- N- Nonmetal
- Na- Metal
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संबंधित प्रश्न
An element X from group 2 reacts with element Y from group 16 of the periodic table.
(a) What is the formula of the compound formed?
(b) What is the nature of bond in the compound formed?
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(a) Which two elements will form a covalent compound?
(b) Which two elements will form an ionic compound?
Write the names and symbols of two very reactive metals belonging to group 1 of the periodic table. Explain by drawing electronic structure, how either one of the two metals reacts with a halogen. With which name is the bond formed between these elements known and what is the class of the compound so formed known? State any four physical properties of such compounds.
The elements Li, Na and K, each having one valence electron, are in period 2, 3 and 4 respectively of modern periodic table.
(i) In which group of the periodic table should they be ?
(ii) Which one of them is least reactive ?
(iii) Which one of them has the largest atomic radius ? Give reason in justify your answer in each case.
Two elements X and Y belong to group 1 and 2 respectively in the same period of periodic table. Compare them with respect to:
(i) the number of valence electrons in their atoms
(ii) their valencies
(iii) metallic character
(iv) the sizes of their atoms
(v) the formulae of their oxides
(vi) the formulae of their chlorides
Give a reason why elements need to be properly classified.
An atom of an element has the electronic configuration 2,8,2. To which group does it belong?
What is the atomic number of elements of period 3 and group 17 of the Periodic Table?
An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound.
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Arrange the following elements in the order of their decreasing metallic character
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- Identify the element
- Write the electronic configuration
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- Write a balanced equation when this oxide is dissolved in water
- Draw the electron dot structure for the formation of this oxide
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- Identify the element X. How many valence electrons does it have?
- Draw the electron dot structure of the diatomic molecule of X. What type of bond is formed in it?
- Draw the electron dot structure for ammonia and what type of bond is formed in it?
Relate the names of the following scientists with the statements given below.
Arranged elements in a group of seven with increasing atomic masses and eighth elements with similar properties kept below the first like eight note in an act of music.
Complete the following triads by inserting the missing elements.
Ca, ______, Ba
The atomic number of an element 'X' is 11.
- Write the electronic configuration of X and find its valency.
- Write the formula and nature of its oxide.
