Check out example codes for "ionic radio". It will help you in understanding the concepts better.

Code Example 1

<ion-list>
  <ion-radio-group value="biff">
    <ion-list-header>
      <ion-label>Name</ion-label>
    </ion-list-header>

    <ion-item>
      <ion-label>Biff</ion-label>
      <ion-radio slot="start" value="biff"></ion-radio>
    </ion-item>

    <ion-item>
      <ion-label>Griff</ion-label>
      <ion-radio slot="start" value="griff"></ion-radio>
    </ion-item>

    <ion-item>
      <ion-label>Buford</ion-label>
      <ion-radio slot="start" value="buford"></ion-radio>
    </ion-item>
  </ion-radio-group>
</ion-list>

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