Question
The following elements, identified here as X, Y, W and Z have the number of electrons, protons and neutrons as shown in the table below.
Protons Neutrons Electrons
X 26 30 26
Y 26 30 23
W 26 28 26
Z 28 28 26
Which of these statements is true
A. X and Y are isotopes
B. W and Z are isotopes
C. X and W are isotopes
D. X and Z are isotopes
Answer
X and W
Students answering correctly understand the definition of an isotope, atoms of the same element with a different number of neutrons, and that all atoms of the same element have the same number of protons.
Claire Phillips (not verified)
What would you do with students that got the wrong answer?