Q8. The list contains the electronic configuration of some atoms: 2,8,1 2,7 2,5 2,3 2,8,4 2,5 2,8,7 2,8 i. Which of these atoms are in Group 1 of the periodic table? ii. Which of these atoms are in Group 7 of the periodic table? iii. Which of these atoms are in Group 0 of the periodic table? iv. Write the electronic configuration of an atom in Group 4 of the periodic table.
Answer (1)
To determine the groups of the elements based on their electronic configurations, we need to understand that the group number in the periodic table often corresponds to the number of electrons in the outermost shell (valence electrons).
Let's analyze each part of the question step-by-step:
i. Which of these atoms are in Group 1 of the periodic table?
Group 1 of the periodic table, also known as the alkali metals, consists of elements with one electron in their outer shell. The electronic configuration that matches this description is:
2,8,1
This configuration corresponds to an element like sodium (Na), which is in Group 1.
ii. Which of these atoms are in Group 7 of the periodic table?
Group 7, also known as the halogens, consists of elements with seven electrons in their outer shell. The electronic configuration that matches this description is:
2,7
2,8,7
These configurations correspond to elements like fluorine (F) and chlorine (Cl), which are in Group 7.
iii. Which of these atoms are in Group 0 of the periodic table?
Group 0, also known as the noble gases, consists of elements with a complete outer shell. In the given list, the configuration:
2,8
This configuration corresponds to neon (Ne), which is in Group 0.
iv. Write the electronic configuration of an atom in Group 4 of the periodic table.
Group 4 elements have four electrons in their outer shell. A typical electronic configuration for a Group 4 element is:
2,4
This configuration would correspond to an element like carbon (C), which is in Group 4.
By understanding the relationship between the number of valence electrons and group numbers, determining the group of each atom based on their electronic configurations becomes straightforward.
