What statements correctly describe the crystal structure of halite?

The unit cell consists of eight ions: four are Na+ ions and the other four are Cl– ions.
The crystal structure is face-centered cubic (FCC).
The sodium ions occupy the lattice points.
The crystal structure is body-centred cubic (BCC).
Each ion in this lattice has six of the other kind of ion as its nearest neighbors.

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.