Concept explainers
(a)
Interpretation:
The number of protons in Na+, K+, Ca2+ and Mg2+ ions needs to be determined.
Concept introduction:
In an atom, number of protons and electrons can be calculated from
(b)
Interpretation:
The number of electrons in Na+, K+, Ca2+ and Mg2+ ions needs to be determined.
Concept introduction:
In an atom, number of protons and electrons can be calculated from atomic number and mass number. The atomic number is equal to the number of protons and electrons present in the neutral atom. The mass number is sum of number of neutrons and protons in the nucleus of an atom.
(c)
Interpretation:
The noble gas having the same electron configurations as in Na+, K+, Ca2+ and Mg2+ ions needs to be determined.
Concept introduction:
Electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. This helps to indicate electrons and orbitals easily.
(d)
Interpretation:
The role of Na+, K+, Ca2+ and Mg2+ ions in the body needs to be explained.
Concept introduction:
Ions play an important role in the body. Calcium, potassium, sodium, chloride, and copper ions are major ions and some key ions that participate in the body's electrical events.

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Chapter 3 Solutions
ALEKS 360 ACCESS CARD F/GEN. ORG.CHEM
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