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प्रश्न
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ______.
पर्याय
Group 2
Group 16
Period 2
d-block
उत्तर
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in Group 2.
Explanation:
- Alkaline Earth Metals include Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).
- These elements have valency 2 because they have two electrons in their outermost shell (s-orbital).
- In the Modern Periodic Table, elements are arranged in groups and periods based on their electronic configuration.
- All Alkaline Earth Metals belong to Group 2.
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संबंधित प्रश्न
State whether the following statement is true of false:
The elements in a group have consecutive atomic numbers.
The element which can from an acidic oxide should be the one whose atomic number is:
(a) 6
(b) 16
(c) 12
(d) 19
The following diagram shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e (which are not their chemical symbols):
-
1 18 a 2 13 14 15 16 17 b c d e
(i) Select the letter which represents an alkali metal.
(ii) Select the letter which represents a nobles gas.
(iii) Select the letter which represents a halogen.
(iv) What type of bond is formed between a and e?
(v) What type of bond is formed between d and e?
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.
In which block of the modern periodic table are the nonmetals found?
(a) How is possible valency of an element determined from the electronic configuration of its atom ?
(b) Determine the valency of an element X whose atomic number is 15.
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.
The number of periods and groups in the periodic table are ______
Which of the following have inert gases 2 electrons in the outermost shell.
Moseley’s periodic table is based on atomic mass.
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 ______
An element with the atomic number 40 is placed in the period.
What type of oxide would Eka– aluminium form?
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
How are elements grouped into various families in the periodic table?
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.
Element 'X' forms an oxide with the formula X2O3 which is a solid with high melting point. ‘X’ would most likely be placed in the group of the Periodic Table as:
