Calcium-40 is a stable isotope of calcium, which has the atomic number 20.Compare calcium-40 and potassium-40 by determining which statements are true.They have the same number of protonsThey have the same mass numberThey have the same number of neutronsThey have different atomic numbers
Question
Calcium-40 is a stable isotope of calcium, which has the atomic number 20.Compare calcium-40 and potassium-40 by determining which statements are true.They have the same number of protonsThey have the same mass numberThey have the same number of neutronsThey have different atomic numbers
Solution
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They have the same number of protons: False. Calcium-40 has 20 protons (since the atomic number of calcium is 20) and potassium-40 has 19 protons (since the atomic number of potassium is 19).
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They have the same mass number: True. Both calcium-40 and potassium-40 have a mass number of 40.
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They have the same number of neutrons: False. The number of neutrons is found by subtracting the atomic number from the mass number. So, calcium-40 has 20 neutrons (40-20) and potassium-40 has 21 neutrons (40-19).
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They have different atomic numbers: True. The atomic number of calcium is 20 and the atomic number of potassium is 19.
Similar Questions
If calcium has only two isotopes, calcium-40 and calcium-44, which would be the most abundant?1 pointcalcium-40calcium-44both isotopes would have the same abundanceboth isotopes are not likely to exist
Atomic mass of calcium is 40. The mass of2.5 gram atoms of calcium is _
If Calcium has 20 electrons and a mass number of 42, it would be classified as an and would have electrical charge equal to (enter a numerical answer with a charge sign in front of the number if necessary).
How many atoms are in 40.08 grams of calcium?
What is the difference between an atom's mass number and its atomic number?Select all statements that apply.They are the sameThe atomic number is just the number of protonsThe mass number is the number of both protons and neutronsThe mass number is the number of protons minus the number of neutrons
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