Study the particle below carefully and answer the questions that followed.
a)ldentify the particle.
b)Write the electronic configuration of the
particle.
c)State
i. Atomic number
ii. Mass number
iii. Proton number
iv. Electron number
d) Calculate the neutron number
e) State the valency
f)What is the valence electrons?

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b is the answer hope that helps

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

c.

explanation: