Bab 10-3

Beryllium compounds tends to form ______ compouds rather than ________compounds.

• covalent, ionic
• ionic, covalent
• covalent, metallic
• ionic, metallic

Which one covalent compound?

• BeBr2
• MgO
• CaF2
• SrSO4

Which one covalent compound?

• BeCl2
• MgCl2
• CaCl2
• SrCl2
• BaCl2

Amphoteric hydroxides react with...

• both alkalines and acids
• alkalines only
• acids only

BeO is an ______ oxide of group 2 while other elements of group 2 forms ______ oxide.

• amphoteric, basic
• amphoteric, acidic
• acidic, amphoteric
• basic, amphoteric

BeO =

• covalent character & amphoteric
• ionic character & basidic
• ionic character & amphoteric
• covalent character & acidic

Which one forms amphoteric compound?

• BeO
• MgO
• CaO
• SrO
• BaO

BeO, beryllium oxide, has _____ melting point than MgO because __________

• lower, the compound form has covalent molecule nature not ionic.
• lower, the compound form has ionic molecule nature not covalent.
• higher, the compound form has covalent molecule nature not ionic.
• higher, the compound form has ionic molecule nature not covalent.

BeCl2 =dissolve in water, hydrolysis in water to produce ______ solution, ____ ions, acidic pH __ 7.

• acidic, H3O+, <
• basidic, OH-, >
• acidic, OH-, <
• basidic, H3O+, >

Which one has lowest pH (acidic) when dissolve in water? NaCl, KCl, BeCl2, MgCl2.

• BeCl2
• MgCl2
• NaCl
• KCl