Hi there, congratulations on becoming an Athiest! I copied this right out of a forum post.

(Note: All the verses are from the noted Islamic scholar Abdullah Yusuf Aali's English translation which is the most widely used and accepted version the world over)
To wit:
1. Surah (3:151) Aal-Imran
Soon shall We cast terror into the hearts of the Unbelievers, for that they joined companions with Allah, for which He had sent no authority: their abode will be the Fire: And evil is the home of the wrong-doers
2. Surah (4:89) Al-Maidah
They but wish that ye should reject Faith, as they do, and thus be on the same footing (as they): But take not friends from their ranks until they flee in the way of Allah (From what is forbidden). But if they turn renegades, seize them and slay them wherever ye find them; and (in any case) take no friends or helpers from their rank.
3. Surah (8:12) Al-Anfal
Remember thy Lord inspired the angels (with the message): "I am with you: give firmness to the Believers: I will instil terror into the hearts of the Unbelievers: smite ye above their necks and smite all their finger-tips off them."
4. Surah (9:5) At-Tauba
Then, when the sacred months have passed, slay the idolaters wherever ye find them, and take them (captive), and besiege them, and prepare for them each ambush. But if they repent and establish worship and pay the zakat then leave their way free. Lo! Allah is Forgiving, Merciful.
5. Surah (9:29) At-Tauba
Fight those who believe not in Allah nor the Last Day, nor hold that forbidden which hath been forbidden by Allah and His Messenger, nor acknowledge the religion of Truth, (even if they are) of the People of the Book, until they pay the zakat with willing submission, and feel themselves subdued.