Question

what element has 5 protons *
oxygen
nitrogen
carbon
boron
what is the isotope of name of boron with 5 protons and 5 neutrons *
boron - 12
boron - 9
boron - 11
boron - 10
what is the isotope of name of boron with 5 protons and 6 neutrons *

Explanation:

Step1: Recall element - proton relationship

The atomic number of an element is equal to the number of protons. Boron has an atomic number of 5, so an element with 5 protons is boron.

Step2: Recall isotope - mass number relationship

The mass number of an isotope is the sum of protons and neutrons. For a boron isotope with 5 protons and 5 neutrons, the mass number is \(5 + 5=10\), so the isotope is Boron - 10.

Answer:

First question: D. Boron
Second question: D. Boron - 10