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

What's a system that removes solid and liquid wastes

What mass of Br2 is used when the reaction consumes 2.0 g of Fe?

Which of the following terms best describes the nucleus of a radioactive element? a. unchanging b. explosive c. unstable d. energized

Q. 40 g of water. specific heat of water is 4.18 J/g*°C. temperature changes from 20° C to 25°C, how much heat energy (Q) moves from the water to the surroundings? a 3,344 J b 836 J c 4,180 J d 209 J

Acid precipitation is caused by a mix of

How is DNA linked to a person's inheritance?

Green plants take in water (H2O) and carbon dioxide (CO2) and produce glucose (C6H12O6) and oxygen gas (O2). Calculate the molar masses of carbon dioxide, glucose, and oxygen gas.

Are 3 eggs the same quantity as 3 dozen eggs?

What is an empirical formula? O A. The chemical formula that reveals how the molecule actually exists in nature O B. The chemical formula that is written in terms of percent composition O C.

What part of an original isotope's number of atoms remains after two half lives?