Question

question 7 1 pts atoms that vary in the number of neutrons found in their nuclei are called ______.
options:

• ions
• isotopes
• alpha particles
• neutral atoms
• neutrons

Explanation:

• Ions are atoms with a charge (different number of electrons), not related to neutrons.
• Isotopes are defined as atoms of the same element with different numbers of neutrons (same number of protons, different mass numbers due to neutron variation).
• Alpha particles are helium nuclei (2 protons, 2 neutrons), not related to neutron variation in atoms.
• Neutral atoms have equal protons and electrons, not about neutrons.
• Neutrons are subatomic particles, not a term for atoms with varying neutrons.

Answer:

B. Isotopes