.imgflt {
   float: left;
   width: 160px;
   margin: 0.5em 0.5em 3em 0;
   border: 0;
   padding: 0;
}

.carbon { color: #008466; }
.hydrogen { color: #f77300; }
.nitrogen { color: #5391ff; }
.oxygen { color: #ff1a3c }
.phosphorous { color: #a0a0a0 }