(No links, if you aren’t gonna answer here don’t answer at all.)
Which of the following statements are true about whether atoms tend to gain
or lose electrons?

A. Atoms with one, two, or three valence electrons will lose
electrons.
B. Atoms with five, six, or seven valence electrons will lose
electrons.
C. Atoms with four valence electrons will always gain electrons.
D. Atoms with eight valence electrons usually do not gain or lose
electrons.

An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such defines the structure of a chemical element.

Generally, these atoms are typically made up of three distinct particles and these are protons, neutrons and electrons.

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

Based on the octet rule which states that atoms of chemical elements gain, lose or share electrons so as to have eight (8) electrons in their valence shell. Therefore, atoms of chemical elements bond in order to attain the electronic configuration of a noble gas i.e a full valence shell which comprises of eight (8) electrons.

This ultimately implies that, atoms with eight valence electrons usually do not gain or lose electrons because they're noble gas.