Which particles in an atom can increase or decrease in number without changing the identify of the elements?

All atoms of an element always have the same number of A Protons B Neutrons C Electrons D Electrons

Think about how pressure relates to volume and how gas behavior would change in different volumes. Which of the following will have the largest positive value for Sº? A) 1 mole of helium gas at 1 atm pressure.

What forms as a result of the erosional processes of weathering? Select all that apply. Soil Lava Sediment Sand

Write the formula for a compound containing one atom of sodium, one atom of oxygen, and one atom of hydrogen

Choose an element that will gain 1 electron in order to achieve noble gas configuration? what is the group name for that element?

What mass of potassium chlorate would contain 40grams of oxygen?

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is A) smaller than the change in momentum of the larger mass, but not zero. B) zero.

How many nuclei of 238 92 U 92 238 U remain in a rock if the activity registers 290 decays per second? (Note that the half life of Uranium-238 is 4.468x109 years)

A base can neutralize an acid. true or false

Hydrochloric acid (12.0 ml of 0.233 m) is added to 296.0 ml of 0.0579 m ba (oh) 2 solution. what is the concentration of the excess h + or oh - ions left in this solution?