If element X has 25 protons, how many electrons does it have?

Which of the following groups contain three elements with stable electron configurations? A. helium, xenon, carbon B. xenon, neon, boron C. calcium, krypton, argon D. argon, neon, xenon

What happen to temperature & pressure as you go deeper into the earth

Compare the limiting reactant and the excess reactant in a reaction

During an ionic bond, electrons are basically transferred from one atom to another whereas in a covalent bond, electron pairs are shared. true or false

Molecule a has a molecular weight of 175 and molecule b has a molecular weight of 450. a 0.1 m solution of each is placed on agar gel. which molecule will diffuse more rapidly through the agar?

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