Periodicity

Which electron configuration represent a transition elements?

• 1s² 2s² 2p⁵

• [Ne]3s²

• [Ar]3d⁵ 4s²

• [Ar]3d¹⁰ 4s² 4p⁶

Match the following 3rd period element based on their reaction with oxygen

• slowly

• S

• vigorously

• Mg

• bright white flame

• Si

• blue flame

• Na

What is the halogen elements that placed in the 3rd period

• Fluorine

• Chlorine

• Bromine

• Iodine

As one of the elements in the halogen group, the oxidation of chlorine depends on the element that bonded with it. Please find the oxidation number of Cl below

• +1

• Cl₂O

• +5

• Cl₂

• 0

• Cl₂O₅

• +7

• Cl₂O₇

Which of this statement regarding of atomic and ionic radii

• Na > Na⁺

• Mg < Mg₂₊

• Cl > Cl ^-

• S < S ^2-

Which of the statement below is not correct regarding to melting point (MP) of 3rd period elements?

• MP Al > MP Na

• Melting point of Si is the highest one

• melting point trend of P to Ar is increasing

• Si has the highest melting point because the giant molecule

Which chloride of period 3 elements will NOT form a basic solution when added to water?

• NaCl

• MgCl₂

• PCl₅

• SCl₂

which sequence of elements is arranged in order decreasing atomic radii?

• Al, Si, P

• Li, Na, K

• Cl, Br, I

• N, C, B

Which properties are most common in nonmetal?

• low ionization energy and high conductivity

• low ionization energy and low conductivity

• high ionization energy and high conductivity

• high ionization energy and low conductivity

Which diagram correctly shows the relationship between electronegativity and atomic number for the elements of period 3?

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