AP Chemistry· difficulty 2/5
Isotopes of an element have the same number of _______ but different numbers of _______.
atoms; molecules
protons; neutrons
neutrons; protons
electrons; protons
Explanation
Same Z (same element) but different N → different mass numbers.
Want 10 more like this — adaptive to your weak spots?
The average atomic mass of X (and its identity) is:…
chevron_rightIdentify element Y based on its average atomic mass.…
chevron_rightChlorine has two isotopes: ³⁵Cl (75%, mass 34.97) and ³⁷Cl (25%, mass 36.97). The atomic mass of Cl is approximately…
chevron_right