Highlight each sentence that is true about atoms, matter, and electric charge. a.âall atoms have an electric charge. b.âelectric charges are carried by particles of matter. c.âelectric charges always exist in wholeâ­number multiples of a single basic unit. d.âwhen a given number of positively charged particles combines with an equal number of negatively charged particles, an electrically neutral particle is formed.

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.