Often on a topographic map, every fifth contour line is darkened. What is this line called?

An element forms an ionic compound with chlorine having the formulaXCl2. If the mass number of the ion is 41and it has 18electrons, what is the element andhow many neutrons does it have?

When balancing a chemical equation, what are the large numbers that we adjust?

How does the number of protons in an atom compare to the number of electrons in an atom?

What is the overall charge of an ion Pat has 12 protons 10 electrons and 14 neutrons

Determine the mass of 2.4 x 10^24 atoms of gold?

A sample of wood that originally contained 100 grams of carbon-14 now contains only 25 grams of carbon-14. approximately how many years ago was this sample part of a living tree?

Metalloids are border of metals and non metals why

In electroplating, how should the object that will be plated be connected in the electrolytic cell? It should be the cathode, where metal atoms are reduced to metal ions. It should be the cathode, where metal ions are reduced to metal atoms.

How many grams of sodium sulfate are needed to make 750.0mL of 0.215 M sodium sulfate solution?

How can I make Mulan sause