Answer:
a stop watch
Explanation:
what would you be doing with a stop watch for collect quantitative data
The atomic number of an isotope is the number of protons it contains, whereas the mass number is the total mass of the nucleus, which is the combined number of protons and neutrons in the nucleus. To find the number of neutrons, you must therefore subtract the atomic number of the isotope from the mass number of the isotope.
<span>In the above example, the atomic number is 8 and the mass number is 18. This isotope is known as O18. The number of neutrons in the isotope is: Mass number - Atomic number = Number of neutrons
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Answer:
epidemic: a disease that is constantly present across the world.
Explanation:
<em>An epidemic is a sudden outbreak of a disease that spreads over a large area within a short period.</em>
<em>Endemic disease is a disease that is found regularly within an area at every point in time.</em>
<em>Pandemic disease is a disease that is prevalent over the whole world within a short period.</em>
<em>Incidence is the number of newly reported cases of a disease.</em>
From the definition of each of the term. epidemic is the only one defined incorrectly of all the options.
<span>The end product of the radioactive decay of uranium is a non-radioactive lead isotope.
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