Question

The teacher shows students a pictorial model of an atom. Which element is

represented by the model and what evidence is provided?
A. Fluorine because the model has 19 neutrons and electrons which is represented by the
atomic number found on the periodic table.
B. Fluorine because the model has 9 protons which is represented by the mass number found
on the periodic table.
C. Fluorine because the model has 9 protons which is represented by the atomic number
found on the periodic table.
D. Neon because there are 10 neutrons which is represented by the atomic number found on
the periodic table.

Answer 1

C. Fluorine because the model has 9 protons which is represented by the atomic number

Step-by-step explanation:

We usually identify an element by the number of protons in them. The number of protons is the atomic number of an atom.

• Every atom has a specific number of protons in them.
• This number of protons is the atomic number.
• According to the periodic law, atoms are arranged on the periodic table based on their atomic number.
• The given fluorine atom has 9 protons which represents the atomic number of the atom.
• This way, the given number clearly shows the right model for identifying the chemical specie.