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Atomic Structure and Chemical Bonding — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYAtomic Structure and Chemical Bonding5 Marks
Question
Compare :
Sodium atom and sodium ion
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Answer

Sodium atom

Sodium-ion

Sodium atom is electrically neutral.

Sodium-ion is positively charged.

In sodium atom, there are 11 protons and 11 electrons, i.e. an equal number of protons and electrons.

In sodium-ion, there are 11 protons but 10 electrons, i.e. sodium ion contains a lesser number of electrons.

The sodium atom has only one electron in its valence shell.

Sodium-ion has 8 electrons in its valence shell.

The size of a sodium atom is larger than a sodium ion.

The size of a sodium ion is smaller than a sodium atom.

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