Copper is used for electrical wirin g and cooking pans however iron is much more common on earth than copper why might copper be used instead of iron if iron is easier to maintain

25. Which of the following statements is true for the element sulfur? A It has 17 neutrons B It has more electrons than Argon C Its symbol is Su D It has 6 electrons on its third energy level

List electrons, neutrons, quarks and protons from lightest to heaviest.

How would you seperate a mixture of marbles corks and nails?

How much heat energy in megajoules is needed to convert 7 kg of ice at - 9 seat to water at 0C

How many grams of O2 are needed to react with 13.6 g of NH3

An aqueous solution is made from a molecular compound rather than from an ionic compound. If some ions are present in solution, which best describes the solute? A. a weak electrolyte B. a nonelectrolyte C. a strong electrolyte D.

Which of the following measures the radiation given off by atoms per second?

What is the name of the outermost layer that forms a boundary around the outside of each cell

What does an ionic compound form?

How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?