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Answer :
Sure, let's match the properties of the calcium-42 positive 2 ion step-by-step.
1. Mass Number: The mass number of calcium-42 is 42.
- Mass number refers to the total number of protons and neutrons in the nucleus.
- Therefore, the mass number is 42.
2. Atomic Number: The atomic number of calcium is 20.
- The atomic number refers to the number of protons in the nucleus.
- Hence, the atomic number is 20.
3. Electrons: Since the calcium-42 ion has a [tex]\( +2 \)[/tex] charge, it has lost 2 electrons.
- A neutral calcium atom would have 20 electrons (equal to the number of protons).
- With a [tex]\( +2 \)[/tex] charge, the ion has 2 fewer electrons, so it has [tex]\( 20 - 2 = 18 \)[/tex] electrons.
- Therefore, the number of electrons is 18.
4. Charge: The ion has a [tex]\( +2 \)[/tex] charge.
- This is explicitly given in the ion's notation.
- Therefore, the charge is [tex]\( +2 \)[/tex], which can also be written simply as +2.
5. Neutrons: To find the number of neutrons, subtract the atomic number from the mass number.
- The mass number is 42 and the atomic number is 20.
- Thus, the number of neutrons is [tex]\( 42 - 20 = 22 \)[/tex].
- Therefore, the number of neutrons is 22.
6. Protons: The number of protons is the same as the atomic number.
- For calcium, this is 20.
- Therefore, the number of protons is 20.
Here is the matching summary:
- Mass Number [tex]\( = \)[/tex] 42
- Atomic Number [tex]\( = \)[/tex] 20
- Charge [tex]\( = \)[/tex] +2
- Electrons [tex]\( = \)[/tex] 18
- Neutrons [tex]\( = \)[/tex] 22
- Protons [tex]\( = \)[/tex] 20
1. Mass Number: The mass number of calcium-42 is 42.
- Mass number refers to the total number of protons and neutrons in the nucleus.
- Therefore, the mass number is 42.
2. Atomic Number: The atomic number of calcium is 20.
- The atomic number refers to the number of protons in the nucleus.
- Hence, the atomic number is 20.
3. Electrons: Since the calcium-42 ion has a [tex]\( +2 \)[/tex] charge, it has lost 2 electrons.
- A neutral calcium atom would have 20 electrons (equal to the number of protons).
- With a [tex]\( +2 \)[/tex] charge, the ion has 2 fewer electrons, so it has [tex]\( 20 - 2 = 18 \)[/tex] electrons.
- Therefore, the number of electrons is 18.
4. Charge: The ion has a [tex]\( +2 \)[/tex] charge.
- This is explicitly given in the ion's notation.
- Therefore, the charge is [tex]\( +2 \)[/tex], which can also be written simply as +2.
5. Neutrons: To find the number of neutrons, subtract the atomic number from the mass number.
- The mass number is 42 and the atomic number is 20.
- Thus, the number of neutrons is [tex]\( 42 - 20 = 22 \)[/tex].
- Therefore, the number of neutrons is 22.
6. Protons: The number of protons is the same as the atomic number.
- For calcium, this is 20.
- Therefore, the number of protons is 20.
Here is the matching summary:
- Mass Number [tex]\( = \)[/tex] 42
- Atomic Number [tex]\( = \)[/tex] 20
- Charge [tex]\( = \)[/tex] +2
- Electrons [tex]\( = \)[/tex] 18
- Neutrons [tex]\( = \)[/tex] 22
- Protons [tex]\( = \)[/tex] 20
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