मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in ______.

Advertisements
Advertisements

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

MCQ
रिकाम्या जागा भरा
Advertisements

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.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Periodic Classification of Element - Exercises [पृष्ठ २८]

संबंधित प्रश्‍न

As element X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong?


An atom has the electron structure of 2, 7.
(a) What is the atomic number of this atom?
(b) To which of the following would it be chemically similar?
7N, 15P, 17Cl, 18Ar
(c) Why would you expect it to be similar?


A metal X is in the first group of the periodic table. What will be the formula of its oxide?


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?


The elements A, B and C belong to groups 1, 14, and 17 respectively of the periodic table.
(a) Which two elements will form a covalent compound?
(b) Which two elements will form an ionic compound?


Find the neutral atom in the periodic table which has the same number of electrons as K+ and Cl. What is this number?


A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser.

(a) What are X, Y and Z?
(b) To which group of periodic table does X belong?
(c) Name the periodic table in which X is placed.
(d) Which element is placed just before X in the period?
(e) Which element is placed just after X in the period?


Classify the following elements into Metals and Nonmetals.

S, Mg, Al, P, N, Na.


Example for liquid metal is ______.


Identify the bond between H and F in the HF molecules.


What property forms the basis of identification?


What is the atomic number of elements of period 3 and group 17 of the Periodic Table?


Which of the following is a transition element?


What type of oxide would Eka– aluminium form?


Which of the following metals have low melting and boiling point?


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.


Relate the names of the following scientists with the statements given below.

Arranged elements in the increasing order of atomic mass.


Complete the following triads by inserting the missing elements.

Ca, ______, Ba


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:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×