Chemistry 12 Unit 13 Period 3

The value of effective nuclear charge ______________ across the PERIOD.

• increases

• decreases

Atomic radius ___________ as we move down the GROUP.

• Increases

• Decreases

• Remains constant

Which of the following  $increases$  as we move across the $PERIOD$  ?

• Ionization Energy

• Electron Affinity

• Electronegativity

• All 3

Which of the following has $Giant\ COVALENT$  structure?

• Si

• Na

• P

• S

Electrical $CONDUCTIVITY$   depends on ___________.

• No. of free electrons

• Size of the element

• Structure of the element

• Electronegativity

Which of the following is a SEMI-CONDUCTOR?

• Si

• Na

• P

• Cl

When Mg reacts with $STEAM$ , it produces ___________.

• Mg(OH) 2

• MgO

• Mg(OH) 3

Complete the general reaction: $Metal+Water\ \longrightarrow$ ___________

• Base + H2

• Acid + H2

Which of the following are the oxides of Phosphorous?

• $P_4O_6\ \&\ P_4O_{10}$

• $P_4O_8\ \&\ P_5O_{10}$

• $P_4O_6\ \&\ P_5O_8$

Which of the following element has $only\ ONE$ oxide?

• Cl

• S

• P

• Mg