Bab 10

Which of the element of group 2 the correct one when down group?

• Be, Mg, Ca, Sr, Ba
• Ba, Mg, Ca, Sr, Be
• Ba, Ca, Mg, Sr, Be
• Be, Ca, Mg, Sr, Ba

Amphoteric, can dissolve (react) in...

• NaOH & HCl
• NaOH only
• HCl only

The melting point and boiling points of group 2 (overall) are ______ when compared to the other elements of the group.

• higher
• lower
• almost same
• slightly different

What happens with NaCl when dissolve in water?

• neutral solution
• acidic
• weak acid

What happens with KCl when dissolve in water?

• neutral solution
• acidic
• weak acid
• basidic

What happens with MgCl2 when dissolve in water?

• weak acid
• acidic
• neutral solution
• basidic

Electronegativity is basically a chemical property that describes how an atom can ________ with an electron in very well way. Values that electronegativity run from _______. As we all know electronegativity is used to assume the bonding between atoms and also see that they are ________, we can also predict that the result of molecules will be _______.

• attract, 0 to 4, ionic or covalent, polar or non-polar
• repulsions, 0 to 4, polar or non-polar, ionic or covalent
• attract, 0 to 4, polar or non-polar, ionic or covalent

Which is more soluble in water between...

• BaF2
• BaSO4

The very ........... fluoride ions have ............... hydration enthalpy compared to the ................ , sulphate ion.

• small, higher, large
• large, higher, small
• large, lower, small
• small, lower, large

The very ........... sulphate ions have ............... hydration enthalpy compared to the ................ , fluoride ion.

• large, lower, small
• small, higher, large
• large, higher, small
• small, lower, large