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Yes, you can can. What is the model and make of your phone ?
To share picture via email, follow the steps below;
Open Gallery and tap the picture you would like to send via email. Tap the Share button and this will bring several options. Scroll left and tap Email (or Gmail if you are using Gmail). Then enter the recipient address and send it.
If you want to send multiple pictures via email, open Gallery, tap and hold down the picture you want to send and this will bring selection mode. Select the pictures one by one and after selecting them, tap the Share button at the top bar. Select the Email/Gmail and you can send from there.
Note : Send max of 5 or below 10 pictures at a time via email. Other wise it may not go through as some emails have limitations.
Let me know how it goes