What does 放射能 look like on Google?

On Google it is the design shipped in 17.0, shown above at full size. Older revisions are listed beneath it.

When did Google add 放射能?

Google first drew 放射能 in Android 6.0.1, released 2015年12月6日.

Google LLC has shipped 18 versions of 放射能. Each is dated, so you can see when the design changed.

Google Android 9.0

This is the design Google introduced in Android 8.0, shipped again unchanged. It was not redrawn for this release.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does 放射能 look like on Google?: On Google it is the design shipped in 17.0, shown above at full size. Older revisions are listed beneath it.
When did Google add 放射能?: Google first drew 放射能 in Android 6.0.1, released 2015年12月6日.
How many times has Google redrawn 放射能?: Google LLC has shipped 18 versions of 放射能. Each is dated, so you can see when the design changed.