The CPU of a laptop is the central processing unit that is basically the heart of your laptop and can perform various applications on how powerful it can be, it is a chip on your laptop motherboard that is removable or sometimes integrated. EX. a 2ghz is much weaker compared to a 4ghz cpu. Without the CPU your laptop is a piece of junk because it will not turn on. A CPU can be optimized for basic tasks such as word documents to extreme gaming. Personally fo you are looking forward to buying a computer go with a higher end CPU as long as it fits your budget because a low end CPU will frustrate you especially if you are a gamer. You will know if you found a CPU is it says Intel or AMD.
A laptop if you want a complete computer that you can carry around (there is a CPU in a laptop)A CPU if you have a computer and want to upgrade or replace the "Central Processing Unit" which is the most expensive and complicated component.
Dell laptop
Intel Atom
You can probably download phone apps to a standard laptop, but they won't be able to run because the laptop CPU and OS are incompatible with the smartphone CPU and OS that the apps were coded for. But if you had them on the laptop and then downloaded them from the laptop to the smartphone, they would run on the smartphone.
This depends on the laptops CPU.
a portable CPU
If you are saying to take it out of a laptop and put it in a desktop computer, then no. Laptop processors (as far as I have seen) are soldered into the motherboard, and designed only for motherboards for laptop sizes. Which in that case, it isn't possible to use a laptop processor in a desktop PC.
Yes, there are some "no name" laptop brands that use desktop CPU-s onto their laptop motherboards. I have a laptop of "Vobis" manufacturer and I'm using Pentium 4 , 2.4 GHz, 533 MHz FSB desktop CPU in that machine.
off the computer
A laptop processor is a CPU optimized for Laptops. One of the main characteristics differentiating laptop processors from other CPUs is low power consumption.
A dual core laptop is a laptop that uses a processor that has two cores. Having two cores allows a laptop to perform more powerful functions and speed than if it had a single core.
to conserve the battery life by reducing the bus speed between the CPU and RAM