A researcher is using a particle accelerator in an experiment studying isotopes. How can the researcher change one isotope into a different isotope of the same element?
by adding valence electrons
by adding or removing protons
by adding or removing neutrons
Sonya reads the element riddle below.
I am shiny. I form +1 ions. There’s more!I am the most reactive metal in Period 4. Who am I?
Which element is the answer to the riddle?
hich describes a value for density?
a value for mass, such as kg, divided by a value for volume, such as m3
a value for distance, such as m, divided by a value for time, such as s
a value for time, such as s, divided by a value for distance, such as m
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