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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
Write the electronic configuration of two elements X and Y whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element X reacts with element Y. Draw the electron-dot structure of the product and also state the nature of the bond formed between both the elements.
Rewrite the following statement after correction, if necessary:
Periods are the horizontal rows of elements.
Why do we classify elements?
An element X is in group 2 of the periodic table what will be the formula of its oxide?
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?
A metal X is in the first group of the periodic table. What will be the formula of its oxide?
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.
An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a compound.
(a) Write the position of these elements in the modern periodic table.
(b) Write the formula of the compound formed.
Justify your answer in each case.
The molecular formula of the chloride of element X is XCl. This compound is a solid having a high melting point. Which of the following elements be present in the same group as X.
How did the early chemists classify elements?
Which of the following have inert gases 2 electrons in the outermost shell.
Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl-.
The atom of an element has electronic configuration 2, 8, 7. To which of the following elements would it be chemically similar?
The elements of group 16 are called ______
Identify and name the metals out of the following elements whose electronic configurations are given below.
- 2, 8, 2
- 2, 8, 1
- 2, 8, 7
- 2, 1
An element is placed in 2nd Group and 3rd Period of the Periodic Table, burns in presence of oxygen to form a basic oxide.
- Identify the element
- Write the electronic configuration
- Write the balanced equation when it burns in the presence of air
- Write a balanced equation when this oxide is dissolved in water
- Draw the electron dot structure for the formation of this oxide
Relate the names of the following scientists with the statements given below.
Arranged elements into groups containing three elements each.
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.
