The elements in any blank in periodic table have similar physical and chemical properties

19. B is the chemical symbol of which element? Boron Boring Balkite Beryllium 20. Zinc (Zn) has an atomic number of 30 and an atomic mass of 65. How many neutrons does a stable atom of Zn have? 30 35 60 95

What does the velocity of a wave describe

What is a prediction of future weather conditions?

Consider the most stable ions which are formed by the elements Cs, Ba, Te, and I. which element will form the ion with the largest radius? a.) Ba b.) Te c.) I d.) Cs

Oxidation-reduction reactions occur because of the competition between particles for

Why does an exothermic reaction need activation energy?

The temperature of 15 grams of water increases by 3.0 degress. how much heat was absorbed by water?

What are the four types of stoichiometry problems?

100 ml oxygen at 1.75 atm and 200ml nitrogen at 0.6 atm are passed to a 500 ml vessel. Calculate the total pressure of the mixture in the vessel at same temperature

Which is the best metal to use in an alloy to increase its electrical conductivity