* not completed

. Periodicity is the regular manner in which the physical and chemical properties of the elements vary with ______________________?

Mass number correct incorrect

Atomic number correct incorrect

Natural abundancy correct incorrect

* not completed

. The valence electron configuration for fluorine is:

2s²2p³ correct incorrect

2s²2p⁵ correct incorrect

3s²3p⁵ correct incorrect

* not completed

. Which element has the largest atomic radius:

Ba correct incorrect

Mg correct incorrect

Ca correct incorrect

* not completed

. The electron configuration of Ba²⁺ is isoelectronic with the noble gas:

Kr correct incorrect

Xe correct incorrect

Rd correct incorrect

* not completed

. Which element has the highest first ionization potential:

boron correct incorrect

fluorine correct incorrect

carbon correct incorrect

* not completed

. Which element is the most electronegative one:

As correct incorrect

Rb correct incorrect

O correct incorrect

* not completed

. ________________ are found primarily in the Earth's crust in silicate minerals; examples include Li, Mg, Ti, Al, and Cr (as their cations).

Lithophiles correct incorrect

Chalcophiles correct incorrect

Siderophiles correct incorrect

* not completed

. Which of the following is an example of a metalloid?

I correct incorrect

Sn correct incorrect

Sb correct incorrect

* not completed

. Which elements of the d-block can achieve the group oxidation state?

Elements in Groups 9 to 10 correct incorrect

Elements in Groups 3 to 8 correct incorrect

Elements in groups 7 to 9 correct incorrect

* not completed

. Which of the following oxides has only acidic character:

MgO correct incorrect

Al₂O₃ correct incorrect

Cl₂O₇ correct incorrect