A secondary carbocation is one in which there. are two carbons attached to the carbon bearing the positive charge. Likewise, a tertiary. carbocation is one in which there are three carbons attached to the carbon bearing the. positive charge. Methyl carbocations. No CâC+ bonds.
Numeric keypad. A numeric keypad, number pad, numpad, or ten key, is the palm-sized, 17-key section of a standard computer keyboard, usually on the far right.It provides calculator-style efficiency for entering numbers.he arrangement of digits on numeric keypads with the 7-8-9 keys two rows above the 1-2-3 keys is derived from calculators and cash registers. It is notably different from the layout of telephone Touch-Tone keypads which have the 1-2-3 keys on top and 7-8-9 keys on the third row.
Alternatively referred to as the number pad, numeric keyboard, or numpad, the numeric keypad is a 17-key keypad usually found on the far right side of a typical IBM 101 / 2-key keyboard. To enable and disable the numeric keypad press the num lock key. numeric 2, also used as the down arrow key. 2  numeric 3, also used as the page down key. 3  enter key. 4  numeric 0 key, also used as insert. 5  period, also used as a delete key.