<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\02622";
}
</style>
</head>
<body>
<p>Radioactive Sign using Hexa Decimal: ☢</p>
<p>Radioactive Sign using HTML Code: ☢</p>
<p id="point">Radioactive Sign using CSS Entity: </p>
</body>
</html>