Justin Bieber has caught a lot of eyeballs lately. This is mostly because of his cryptic social media posts, which have ...

In 1869, Mendeleev's first periodic table did not include them, as closed-shell elements remained undiscovered ... of 'chemical properties'; elements coming late to the party, with no unpaired ...

“It got me out of my shell for the first time. … It’s cool to compare myself as a ninth grader to now. I’m more confident and outspoken while still shy and reserved but can more easily ...