The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...

I write about money. I’ve been reviewing tax software and services as a freelancer for PCMag since 1993. Along the way, I took on reviews of other types of business and personal finance technology.

Danni Santana has spent seven years as an editor and business journalist covering industries like sports, retail, restaurants, and now personal finance. Most recently he worked as a retail editor ...

When chlorine (as a gas or dissolved in water) is added to sodium bromide solution, the chlorine takes the place of the bromine. Because chlorine is more reactive than bromine, it displaces ...

Lego blocks have been dubbed ‘anti-LGBT’. However, the tour has taken aim at Lego blocks because the children’s toy has “male or female parts which “mate” with each other. The tour ...

This table summarises some of the properties and uses of three halogens: ...