Atomic Wallet history tab: 

In the History tab you can see all your transaction history in Atomic Wallet. Click on the transaction to see hash. Blockexplorer will be opened in the new window on your default browser.
Green sign means that transaction has been approved in the blockchain. Grey sign means pending transaction. In my case I recovered wallet from back-up that's why exchange ETH-TRX was shown as pending.

In the meantime, check out our Ethereum Wallet.