Question

density is a fundamentally important property of metals used in engineering, construction, medical devices, etc. shown below is a periodic table highlighting the positions of the elements magnesium (mg), titanium (ti) and iron (fe). arrange these three metals in order of expected increasing density. to do this you will have to assume that the way the atoms pack in the different metals is identical (which isnt too bad of an assumption in this case) and that differences in the atomic sizes can also be ignored, in other words, assume that identical numbers of atoms of the metals atoms would occupy the same volume. you dont have to do any calculations to solve this problem! (lowest density) fe < ti < mg (highest density) (lowest density) mg < fe < ti (highest density) (lowest density) mg < ti < fe (highest density) (lowest density) ti < mg < fe (highest density) dont test me yet, i am trying to gain an understanding before attempting to answer this question.

Explanation:

Step1: Recall density trend

In general, density increases with increasing atomic number for metals when considering similar packing structures.

Step2: Identify atomic numbers

Mg has atomic number 12, Ti has atomic number 22, Fe has atomic number 26.

Step3: Arrange by density

Based on atomic - number trend and assuming similar packing, the order of increasing density is Mg < Ti < Fe.

Answer:

(lowest density) Mg < Ti < Fe (highest density)