14. Write the number of protons, neutrons and electronic
configuration of 39,19K, 31 ,15
P. Also state their position in
the periodic table.
Answers
Answer:
Explanation:
in 39,19 k-
19 protons, 20 neutrons and 18 electrons.
The atomic number gives the number of protons 19
p = 19
The atomic mass is the sum of the protons and neutrons
p + n = 39 p
= 19
put p into the equation and solve for n the neutrons.
19 + n = 39
Subtract 19 from both sides
19 - 19 + n
= 39 − 19 n
= 20
The number of electrons equals the number of protons in a neutral atom. The positive charge equals the negative charge. The negative charge is the number of electrons. This ion has a charge of +1. So solve for the negative charge.
− 19 + 1 =− 18
The negative charge is -18 so
e = 18
in 31 ,15 P:
In 31p15, the number of proton, electron and neuton is as follows: Proton = 15, electron = 15, neutron = 16. This is because the 31 is the mass number of Phosphorus and 15 is the atomic number. The atomic number is equal to the number of protons.