Question

For a metal & a non-metal with particular emphasis on valency:

• A. Both have covalency
• B. Both have electrovalency
• C. Non-metal exhibit covalency but metals do not
• D. Both B and C

Answer 1

Answer: (D)

Both B and C

Electronic configuration	They usually have 1, 2 or 3 electrons in their valence shell. The greater the number of shells and lesser the number of valence electrons, the greater is the reactivity of the metal.	They usually have 4, 5, 6 or 7 electrons in the valence shell. If it has 8 electrons, it is called a noble gas. Lesser the number of shells and greater the number of valence electrons, greater is the reactivity of the non-metal.
Ionization	They always ionize by losing electrons	They always ionize by gaining electrons
Charge of ions	Positively charged.	Negatively charged.
Type of valency	Metals always exhibit electrovalency.	Non-metal exhibit both electrovalency or covalency.