An electron in a sodium atom moves from the third shell to the fourth shell. This change is a result of the atom

(1) absorbing energy (3) gaining an electron

(2) releasing energy (4) losing an electron

If the pressure and temperature of a gas remain constant, what would cause the the volume to increase? A. increase in the molecular mass B. the number of moles of the gas increases C. the partial pressure of the gas increases D. all of the above

Which statement is true? A) Unicellular organisms cannot obtain energy or reproduce, but they can maintain structure (homeostasis).

How much does 1ml of water weigh in grams?

What is the oxidation number of the chloride ion in HClO?

Histamine is a substance that is released by cells in response to injury, infections, stings and materials that cause allergic responses, such as pollen.

What is the difference between the electronegativity values of sodium and bromine?

Which of the following elements is the most stable element? argon, manganese, phosphorus, robidium

List results of Chemical Reactions.

When you measure something in meters cubed, you are measuring

Low density: low pressure: high density Is which. evaporation? water vapor? condensation / liquid water