Strontium Oxide Has a Face-Centered Cubic Unit Cell of Oxide

question 4

Multiple Choice

Strontium oxide has a face-centered cubic unit cell of oxide ions with the strontium in octahedral holes.If the radius of Sr²⁺ is 127 pm and the density of SrO is 4.7 g/cm³,what is the radius of the oxide ion? (100 cm = 1 × 10¹² pm)

• A) 176 pm
• B) 132 pm
• C) 127 pm
• D) 137 pm
• E) 273 pm

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Definitions:

Charged Particles

Particles with either a positive or negative electrical charge, which include ions and electrons.

Midsagittal Plane

An anatomical plane that divides the body into equal right and left halves.

Divides the Body

Refers to anatomical planes or lines that segment the human body into different parts for medical and anatomical studies.

Contains the Chromosomes

Refers to cell structures, found within the nucleus of eukaryotic cells, that hold genes, the basic units of heredity, in long strands of DNA.