Question

ement 'M' has an atamic number 19
and has 20 neutrons in it's nucleus
Calculate its
1) Mass number and
2) write the electronic configuration of element 'M'​

Answer 1

Answer:

1)Mass number=no.of protons+no.of neutrons

=19+20

=39

2)Electronuc configuration of an element M=(2,8,8,1)

Answer 2

Answer:

M= potassium

electron = proton = atomic number = 19

neuron 20

1) Mass number = proton + neutron

= 39

2) 2 , 8, 9

Explanation:

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