HELP!! Which of the following statements best explains why the atomic radius decreases from left to right across a period?
A.
The number of neutrons in an atom increases from left to right across a period, and they pull the valence electrons inward with greater force.
B.
The number of electrons decreases from left to right, so the electron cloud occupies a smaller volume.
C.
The charge of the nucleus of an atom increases from left to right across a period, so the valence electrons are pulled inward with greater force.
D.
The number of energy levels decreases from left to right, so the electron cloud occupies a smaller volume.

there all right good

explanation:

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.