Advertisements
Advertisements
प्रश्न
The mass number of an element is 23 and it contains 11 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
Advertisements
उत्तर
Given:
Mass no. = 23
No. of electrons = 11,
No of protons = No. of electrons = 11
No. of neutrons = 23 – 11 = 12
Atomic number of the element = 11
APPEARS IN
संबंधित प्रश्न
Fill in the blank
An ion which has a positive charge is called a ..................
Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
The atomic number and the mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement.
Fill in the blank of the following statement :
The total number of protons and neutrons in the nucleus of an atom is called its _________.
(a) Which of the nuclear particles is present in the same fixed number in the atoms of any particular element?
(b) What do we call this number which is characteristic of a particular element?
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element which can form trivalent ion
Elements X, Y and Z have atomic numbers 6,9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Do isotopes have the same atomic number or the same mass number?
Give short answer:
what is the atomic mass number? mention its formula.
