Answer
See the explanation
Work Step by Step
(a) Number of protons and neutrons in the nucleus
Protons: 5
Neutrons: 6
Answer: 5 protons and 6 neutrons
(b) Atomic number
Atomic number = number of protons = 5
Answer: 5
(c) Mass number
Mass number = protons + neutrons = 5 + 6 = 11
Answer: 11
(d) Number of electrons in the neutral atom
In a neutral atom, electrons = protons = 5
Answer: 5
(e) Element symbol
The element with atomic number 5 is boron.
Symbol = B
Answer: B
