Which change occurs when an atom in excited state returns to ground state? 1 energy is emitted 2energy is absorbed 3 the number of electrons decreases 4 the number of electrons increases

Which type of scientist would observe the spread of a species of red fire ants

A solid, pure substance containing just carbon and hydrogen is found to contain 35.8g of carbon and 3.72 g of hydrogen. how many grams of carbon will be in a 4.82 g sample of the solid?

What happens when two or more atoms react?

Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and potassium chloride when heated. KClO3 (s) → KCl (s) + O2 (g) [unbalanced] What mass of oxygen gas is formed if 26.4 g of potassium chlorate decomposes completely?

How do the viscosities of liquids and low-density gases depend on the temperature and pres - sure?

How many valence electrons does the neutral Mg atom have?

Which of these substances contributes to soaps slippery texture? - an acid - a base - carbonate - water

A student places a 12-gram cube of Ice Inside a container. After six hours, the student returns to observe the contents of the container.

Select the statements that best describe the properties of an intramolecular sn2 reaction mechanism.

Is a iron nail solid attracted to a magnet and soluble in water