The loss of an electron from a neutral helium atom results in
A) neutral hydrogen.
B) ionized hydrogen.
C) ionized helium.
D) neutral deuterium.
E) ionized deuterium.
Question 2
The extent to which Mars has been habitable essentially boils down to the
A) question of whether liquid water has ever been present on its surface
B) question of whether oceans of liquid water have existed on its surface
C) amount of water that has been present on its surface
D) length of time liquid water has been present at or below its surface
Scanning electron micrograph of a macrophage engulfing numerous bacteria.
Energy of Electron according to Electron Shells
Insects Under the Electron Microscope
An ant under an electron microscope
Atom Structure
National Results of the Scholastic Assessment Test (SAT)