Why do group 12 elements have different properties then group 13 elements

For what reasons would modern scientists accept dalton's atomic theory but not the idea of an atom proposed by the greek philosophers?

What is the average atomic mass of sodium

What are the metric units of density

Which type of substance can conduct electricity in the liquid phase but not in the solid phase and why? 1) ionic compound 2) metallic compound 3) nonmetallic compound 4) molecular compound

Chlorine has an atomic number of 17. How many protons are in an atom of chlorine? A. 17 B. 18 C. 35 D. 52

In the reaction, Zn + HCl-> ZnCl2 + H2, 25 grams Zn are reacted with 17.5 grams HCl. How many grams of H2 will be produced? A. 0.382 g of H2 B. 0.479 g of H2 C. 0.7865 g of H2 D. 0.484 g of H2

The temperature scale that starts with absolute zero is the ___ scale

A sample of hydrogen gas has a pressure of 1.50 atm with a volume of 5.00 L, what is the pressure if the volume is expanded to 7.74 L

Which substance is an Arrhenius acid

Which is another name for groups of elements