Strontium

Strontium 90: One of the radioisotopes of strontium; part of radioactive fallout, harmful to human health.

Beryllium, magnesium, calcium, strontium, barium and radium are alkaline earth metals.

The study, conducted by researchers at the New York University (NYU) School of Medicine and published Thursday in the Particle and Fibre Toxicology Journal, indicates that common fireworks displays and other commercially available fireworks that explode in the air release heavy metals such as titanium, copper, strontium and even lead particulates into the air.

Davy, a British chemist, isolated the pure elements barium, boron, calcium, magnesium, potassium, sodium and strontium, but we owe the discovery of metallic aluminium to Ørsted, a Danish physicist.