Question

As a rule, ___ examination room(s) should be available for each veterinarian.

a) One
b) Two
c) Three
d) Four

Answer 1

Nitrogen, with an atomic number of 7, has two electron shells. The first shell holds 2 electrons and the second holds the remaining 5.

Step-by-step explanation:

The question 'Nitrogen has an atomic number of seven. How many electron shells does it likely have?' relates to the structure of an atom in Biology. Nitrogen, with an atomic number of 7, means it has 7 protons and ordinarily 7 electrons when neutral. The arrangement of electrons around the nucleus of an atom is organized into shells or energy levels. The first shell can hold up to 2 electrons, and the second can hold up to 8 electrons. Since the atomic number of nitrogen is 7, it would fill the first shell with 2 electrons and have 5 electrons in the second shell.

Therefore, the answer is b. two electron shells. This is because after filling the first shell with 2 electrons, the remaining 5 electrons will occupy the second shell, and no more shells are needed to house the electrons of a nitrogen atom in its ground state.