Multiple Choice
Which nuclide has 18 neutrons?
1
views
4. Atoms and Elements
Isotopes
Struggling with Introduction to Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which element is represented by an atom that has 9 protons and 10 neutrons?
A
Neon-19
B
Oxygen-19
C
Fluorine-10
D
Fluorine-19
Verified step by step guidance1
Identify the atomic number of the element, which is equal to the number of protons. Here, the atom has 9 protons, so the atomic number is 9.
Recall that the atomic number corresponds to the element's identity on the periodic table. The element with atomic number 9 is Fluorine.
Determine the mass number of the atom by adding the number of protons and neutrons: \(\text{mass number} = \text{protons} + \text{neutrons} = 9 + 10\).
Write the isotope notation using the element name and the mass number: Fluorine-19.
Compare the options given and confirm that Fluorine-19 matches the element with 9 protons and 10 neutrons.
Related Videos
Related Practice
