Question

Q-1) The number of electrons in an atom of an element is equal to its 
A) Atomic weight  
B)  Atomic number
C) Equivalent weight           
D) Electron affinity

Q-2) The nucleus of the element having atomic number 25 and atomic weight 55 will contain
A) 25 protons and 30 neutrons
B) 25 neutrons and 30 protons
C) 55 protons
D) 55 neutrons

Q-3) The total number of neutrons in dipositive zinc ions with mass number 70 is
A) 34          
B) 40
C) 36          
D) 38

Q-4) Which of the following are isoelectronic with one another 
A) Na+ and Ne
B) K+ and O
C) Ne and O
D) Na+ and K+

Q-5) Chlorine atom differs from chloride ion in the number of
A) Proton 
B) Neutron
C) Electrons            
D) Protons and electrons

Q-6) The mass of an atom is constituted mainly by
A) Neutron and neutrino  
B) Neutron and electron
C) Neutron and proton      
D) Proton and electron

Q-7) An atom has 26 electrons and its atomic weight is 56. The number of neutrons in the nucleus of the atom will be
A) 26          
B) 30
C) 36          
D) 56

Q-8) A sodium cation has different number of electrons from
A) O2− 
B) F−
C) Li+   
D) Al+3

Q-9) An atom which has lost one electron would be
A) Negatively charged
B) Positively charged
C) Electrically neutral
D) Carry double positive charge

Q-10) Number of electrons in the outermost orbit of the element of atomic number 15 is
A) 1             
B) 3
C) 5             
D) 7​

Answer 1

Answer:

1)b

2)b

3)b

4)a

5)b

6)b

7)a

8)b

9)a

10)c

Answer 2

Here are the answers to your question:

Question 1 : B)Atomic Number

Question 2 : A)25 Protons and 30 Neutrons

Question 3 : B)40

Question 4 : A)Na+ and Ne

Question 5 : C)Electrons

Question 6 : C)Neutron and Proton

Question 7 : B)30

Question 8 : A)O2-

Question 9 : B)Positively Charged

Question 10 : C)5