Atoms can combine with atoms of the same element (for example, oxygen, hydrogen or a lump of carbon). The number of different combinations of atoms (making compounds) is vast. From only about 100 elements we get the millions of different materials we see around us every day.
Where Refunds Apply. The Steam refund offer, within two weeks of purchase and with less than two hours of playtime, applies to games and software applications on the Steam store. Here is an overview of how refunds work with other types of purchases.
In order to receive the Steam digital gift card you must send payment and the payment must be approved before the card will be sent to you. 1  This approval process takes normally less than one hour and is not necessary on all orders. 2  There are no refunds or exchanges on these types of digital orders.