The atomic number of an atom is always equal to the number of its

(1) protons, only (2) neutrons, only (3) protons plus neutrons (4) protons plus electrons

What is happening if there is no overall energy change during a chemical reaction?

Hydrogen has only one electron in its only (and outer) electron shell. If a hydrogen atom were to absorb a tremendous amount of energy where would Bohr say the electron would go? A. fly off the atom B. nowhere, it would just speed up. C.

Write 3.05 x 10^-3 in standard notation

When the atoms of two substances joined to make a new substance the process is called?

Which is the most dense: honey, milk, or corn syrup? A. Honey B. Milk C. Corn syrup

How are electromagnetic different than all other waves

Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming non-relativistic final speeds. Take the mass of the hydrogen ion to be 1.67*10^{-27} kg.

A type of rock that undergoes changes because of heat and pressure

How many milliliters of a 1.25 molar HCL solution would be needed to react completely with 60 g of calcium metal Ca+2HCl - - > CaCl2 + H2

What mass of copper is required to replace silver from 4. oog ogre silver nitrate dissolved in water