A substance Ax By crystallizes in a face – centred cubic lattice in which atoms A occupy the centres of each face of the cube. Identify the correct composition of the substance Ax By. A substance Ax By crystallizes in a face - centred cubic lattice in which atoms A occupy the centres of each face of the cube. Identify the correct composition of the substance Ax By. December 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related