Within the main group elements, a family on the periodic table has the same number of electrons on in the valence level. TRue or false

Which of the following combinations will result in a reaction that is spontaneous at all temperatures?

a flask of 5 litres capacity can with stand a pressure of 10atm and is filled co2 at 27°c and 760mm of hg pressure. at what temperature will it explode on heating

What is the empirical formula for c4h10

A neutral atom has a mass number of 108 and in atomic number of 47 which atom is this? explain how you know. ^how many Protons electrons and neutrons are in this Atom.

A substance formed when two or more elements combine and lose their distinct properties is

The most common element in the atmosphere are

What Is the name of the force that holds together the sub Tomic particles of the nuclear?

Henry Moseley used X-ray experiments to determine the atomic number of elements. How did his discovery contribute to the development of the periodic table? A. It confirmed that elements should be arranged in strict order of increasing atomic mass. B.

Does pollution stay in the city where it originates

Cao (s) + h2o (l) = ca (oh) 2 (s) what mass of slaked lime can be produced from a mixture of 28.4 g of cao and 13.3g of h20