td{ border: solid 1px;
width: 5%;
height: 8vh;
border-radius: 3%;}
table{width: 100%;
height: 100vh;}
.borderless{border:none;
text-align: left;
font-size: 24px;
height: 1vh;}
*{box-sizing: border-box;
margin: 0;}
.naometais{background-color: lightgreen;}
.gasnobre{background-color: lightskyblue;}
.metalalcanino{background-color: orange;}
.alcalinoterroso{background-color: yellow;}
.transicao{background-color:lightcoral;}
.lactanideos{background-color: aquamarine;}
.actinideos{background-color:lightpink;}
.semi{background-color:mediumseagreen;}
.ometais{background-color:lightgray;}
.halogenios{background-color: lightblue;}
.mid{height: 1%;}
.square{height: 1px;
width: 1px;}
.heading{text-align: center;
font-family: Georgia, 'Times New Roman', Times, serif;
font-size: 30px;}