calculate the number of neutrons and valency of the element 19/9F
Answers
Answer:
Element is Florine
Explanation:
Mass = 19
Number = 9
Protons = Electrons = Mass = 10
Neutron = 19 - 9 = 10
Electronic Configuration = (2,7)
Valency = 8 - 7 = 1
Hope it helps you
Explanation:
The atomic number is the number of protons
(
p
+
)
. In a neutral atom, the number of electrons
(
e
−
)
equals the number of protons. Mass number is the sum of the protons and neutrons
(
n
0
)
of a particular isotope. If you have mass number and atomic number, subtract the atomic number from the mass number to get the number of neutrons.
(
Mass number
)
−
(
atomic number
)
=
number of neutrons
.
There are:
9 protons
9 electrons
10 neutrons
Fluorine is the element in question, as its atomic number is
9
. You would name this particular isotope using the mass number. It would be called fluorine-19.
The nuclear or isotopic notation would be
19
9