The mass (weight) of an electron is approximately equal to 1/1836 that of a hydrogen atom, which has one electron and one proton, so an electron is 1/1836th the size of a proton. Electrons carry a small electronically negative charge. In this model, electrons are in constant motion around the center of the atom.
The Nintendo 3DS costs around $169.99 USD. At launch, it was $249.99 USD, but the price dropped on August 12, 2011. However, that's just Nintendo's suggested retail price, so you might get lucky and find a 3DS for an even cheaper price somewhere else. The Nintendo 3DS XL is larger than the 3DS. It has not just larger screens but also a thicker overall size with bigger buttons and Circle Pad, plus a longer lasting battery. This is why it's a little more expensive than the 3DS, at around $199.99 for a basic model. Nintendo consoles can be purchased from variety of places but you'll notice that ones bundled with games or special cases will cost a little more than $169.99.
The Nintendo Switch, according to the video, will be available March 2017. But how much will the Switch cost? Nintendo hasn't confirmed the cost for the convertible console, according to TechRadar, but the credit-rating agency Macquarie predicts the Switch will retail between $300 and $350. But TechRadar pointed out this might be based on outdated information that easily could have changed.