who were the first 7 atronauts?

Question

doing it for a project

Answer 1

The "Mercury Seven" were Scott Carpenter, L. Gordon Cooper, Jr., John H. Glenn, Jr., Virgil I. "Gus" Grissom, Walter M. Schirra, Jr., Alan B. Shepard, Jr., and Donald K. "Deke" Slayton.

The website referenced below discusses how they were selected:

"The committee recognized that the unusual conditions associated with spaceflight are similar to those experienced by military test pilots. In January 1959, the committee received and screened 508 service records of a group of talented test pilots, from which 110 candidates were assembled. Less than one month later, through a variety of interviews and a battery of written tests, the NASA selection committee pared down this group to 32 candidates.
Each candidate endured even more stringent physical, psychological, and mental examinations, including total body x-rays, pressure suit tests, cognitive exercises, and a series of unnerving interviews. Of the 32 candidates, 18 were recommended for Project Mercury without medical reservations."

Answer 2

Assuming your question refers to the first seven astronauts selected by NASA, then the answer is, as has already been said, Alan B. Shepard, Virgil I. 'Gus' Grissom, John H. Glenn, M. Scott Carpenter, Walter M. Schirra, L. Gordon Cooper and Donald K. 'Deke' Slayton. The first six actually flew in space, in that order, in Project Mercury, while Deke Slayton was grounded due to a minor heart murmur. This heart condition caused him no discomfort, no blackouts, no disorientation, and had not been an obstacle to his highly successful career as a test pilot before joining NASA. Many doctors checked him over, and the advice given to NASA was that there was nothing physically stopping him flying in space, but why take the risk when they had six healthy men.

The first seven Americans to fly in space were the six Mercury astronauts listed above, plus John Young. Young was one of the second group of astronauts selected and flew with Grissom on the first manned flight of Project Gemini.

Answer 3

Note that technically the answer depends on whether the question is referring to people called astronauts by their government (i.e. Americans only), or people who did what astronauts do: i.e. flew into space.

If the question is referring to people who flew into space, then you'd need to add a few Russians to the list... but they were known as cosmonauts rather than astronauts.