Electronegativity and molecular polarity are central to understanding chemical bonding. By combining periodic trends with molecular geometry, you can predict whether a molecule is polar or nonpolar.

Bond polarity is all about how atoms share electrons—and when that sharing isn’t equal, fascinating things happen. From electronegativity differences to molecular geometry, these factors decide ...

Could early February's blast of cold in the northeastern United States be one of the last appearances of our wintertime foe, the polar vortex? While forecasters can't yet say that for sure, a warmer ...

Rising temperatures and rapidly melting sea ice threaten polar bears across the Arctic. But the bears living 800 miles north of the Arctic Circle have stayed surprisingly fat, researchers report ...

The possibility of snow in Tampa, Fla. Record heat and fires in Australia. Scientists say climate change is exacerbating weather extremes. By David Gelles On a typical winter day, the Arctic air that ...

Three members of a family, including a child, were injured by a polar bear in a rare attack in the far north of Siberia, Russian officials said Monday. Local police "received a report of a polar bear ...

The Arctic Ocean current is at its warmest in the last 125,000 years, and temperatures continue to rise. Due to these warming temperatures more than two-thirds of polar bears are expected to be ...

The polar vortex has broken, and severe temperatures are set to dominate most of the country in the coming days. Temperatures in the 10s are forecast for much of the Northeast, and subzero ...

(NEXSTAR) – A good chunk of the country could be in for cooler-than-average temperatures this Thanksgiving and beyond. The most recent outlooks from the National Weather Service’s Climate Prediction ...

HEIDELBERG exclusively obtains technology for Polar Mohr postpress products, including patents, intellectual property rights, and brand Polar Group, owned by SOL Capital Management, to remain ...

A lobe of the polar vortex, a ring of freezing air typically found near the North Pole, will once again move into the central and eastern states this week, bringing some of the coldest air of the ...