The species that has two more neutrons than electrons are ₂₀⁴⁰Ca²⁺ and ₁₁²³Na⁺ has two more neutrons than electrons; option C and D
What are the fundamental particle in an atom?
The fundamental particles in an atom are the particles which make up the atom.
An atom is composed of three fundamental particles:
- protons
- neutrons, and
- electrons
The number of protons in atom is the atomic number of the element.
The number of neutrons in atom is the difference between the mass number and atomic number of the atom.
For the given species;
₃⁶Li⁺:
number of protons = 3;
number of neutrons = 6 - 3 = 3
number of electrons = 3 -1 = 2
₄⁹Be²⁺:
number of protons = 4;
number of neutrons = 9 - 4 = 5
number of electrons = 4 -2 = 2
₁₁²³Na⁺:
number of protons = 11
number of neutrons = 23 - 11 = 12
number of electrons = 11 -1 = 10
₂₀⁴⁰Ca²⁺:
number of protons = 20
number of neutrons = 40 - 20 = 20
number of electrons = 20 -2 = 18
Therefore, ₂₀⁴⁰Ca²⁺ and ₁₁²³Na⁺ has two more neutrons than electrons.
Learn more about electrons and neutrons at: https://brainly.com/question/28476164
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