For elements to have similar physical and chemical properties, what must be true about them?

What do two or more atoms form when they share electrons in a chemical bond

POh = 5.3 is it a acid, basic or neutral susbatance

1. Gases are made up of molecules which are relatively far apart. 2. The molecules are in motion at high speeds. 3. The molecular collisions are perfectly elastic. 4. Increase in temperature increases the kinetic energy of the molecules.

What is the mass of 7 moles of Fe2O3

What elements valence electrons are located in 5s25p4? A. Te B. Mo C. Pm D. Re

How long does nicotine stay in your system

Compare the densities among the three states of matter (which is highest, lowest?)

Epsom salts (magnesium sulfate) have a solubility of 26.2 grams. If you dissolved 26.0 grams of Epsom salts in 100 g of water at 20 degrees Celsius, what type of solution would this be?

An airplane model is an example of what type of model

A radioactive isotope has a half-life of 2.5 years. Which fraction of the original mass remains unchanged after 10 years?