When electrons are filling energy levels, the lowest energy sublevels are

occupied first. This is

A. None of these

B. The Aufbau principle

C. Hund's rule

D. Conservation of energy

Reset Selection

Medicine and urine are seperated by which method?

How do the atomic radius and metallic properties of sodium compare to the atomic radius and metallic properties of phosphorus? (1) Sodium has a larger atomic radius and is more metallic. (2) Sodium has a larger atomic radius and is less metallic.

In a chemical reaction, 12 grams of sodium must combine with how many grams of chlorine to produce 30 grams of table salt?

The unfolding of a protein by heat or chemical treatment is referred to as

What are the two fundamental portions of an atom?

What is a cause of polarity in water molecules?

Which is the force of attraction that holds atoms together? A. gravity B. friction C. physical bond D. chemical bond

Chemical bonding ranges from even electron sharing to total electron transfer because Select one: a. atoms on the periodic table have many different electronegativities b. some atoms can make more bonds than other atoms can c.

An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law

Whats the main difference between a double replacement reaction and a single replacement