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of 100 cm. hnd a) its kinetic energy. B) Velocity. Just as reduieste gruno
B Number of electron, proton and neutron in chemical species A,B,C,and D is given below:
Element Electrons Protons Neutrons
A
2
3
4
B.
10
9
8
C С
8
8
8
D
8.
8
10
Now answer the following questions:
a) What is the mass number of A and B?
b) What is the atomic number of B?
c) Which two elements represent a pair of isotopes and why?
d) What is the valency of element C?
e) What is the valency of element D?
Also justify your answers.
Answers
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Answer:
electron, proton and neutron in chemical species
Explanation:
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