Identify the Mg2+ ion from the Fig.4.1, where n and p represent the number of neutrons and protons respectively.
"
Correct Answer: (d)
Explanation:
Atomic number (Z) of magnesium is 12
Mass number (A) is 24 ( as p = 12, n = A - Z = 24 - 12 = 12 ).
Electronic configuration of Mg atom is 2, 8, 2.
Electronic configuration of Mg 2+ion is 2, 8 (the positive charge is due to the loss of 2 electrons).
The number of protons and the number of neutrons inside the magnesium atom remain unaffected by the formation of a magnesium ion by the magnesium atom.
Option (B) and Option (C) do not represent the number of neutrons (n) and the number of protons (p) correctly.
Option (A) represents Mg atom but not Mg 2+ion.
Related Articles
- Explain the discovery of electrons, protons, and neutrons.
- Compare the properties of electrons, protons, and neutrons.
- The atom of an element X contains 17 protons, 17 electrons, and 18 neutrons whereas the atom of an element Y contains 11 protons, 11 electrons, and 12 neutrons.(a) What type of ion will be formed by an atom of element X ? Write the symbol of the ion formed.(b) What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from X?(c) What type of ion will be formed by an atom of element Y ? Write the symbol of the ion formed.(d) What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from Y?(e) What is the atomic mass of (i) X, and (ii) Y?(f) What could the elements X and Y be?
- Name the central part of an atom where protons and neutrons are held together.
- The nucleons are(a) protons and electrons(b) neutrons and electrons(c) protons and neutrons (d) none of these.
- What are the mass number and the atomic number of an atom with 8 protons and 7 neutrons?
- Which of the following statement is always correct?(a) an atom has equal number of electrons and protons (b) an atom has equal number of electrons and neutrons (c) an atom has equal number of protons and neutrons (d) an atom has equal number of electrons, protons and neutrons
- The atomic number of sodium is 11 and its mass number is 23. It has(a) 11 neutrons and 12 protons (b) 12 protons and 11 electrons(c) 11 electrons and 12 neutrons (d) 12 electrons and 11 neutrons.
- The isotopes of an element contain :(a) same number of neutrons but different number of protons(b) same number of neutrons but different number of electrons(c) different number of protons as well as different number of neutrons(d) different number of neutrons but same number of protons
- State the location of electrons, protons and neutrons in an atom.
- Explain the formation of (i) sodium ion, and (ii) chloride ion, from their respective atoms giving the number of protons and number of electrons in each one of them. What is the reason for positive charge on a sodium ion and a negative charge on a chloride ion ?
- The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?13101416
- Name the scientist who discovered protons and neutrons in an atom.
- What is the relationship between an atom containing 11 protons, 11 electrons and 11 neutrons, and another atom containing 11 protons, 11 electrons and 12 neutrons?
- What name is given to those atoms which contain the same number of protons and electrons but different number of neutrons?
Kickstart Your Career
Get certified by completing the course
Get Started
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies