the number below and to the right of an element in a chemical formula. It represents the number of atoms of that element in chemical compound or molecule.

How many atoms are in ErAg

Which form of fossils can preserve the internal structures of an organism?

Identify the characteristics that describe how human proteins are assembled. Check all that apply.

True or false, Acids give soaps their useful properties?

How many moles are in 15.5-g SiO2

What does the velocity of a wave describe

Sulfur (S) has 16 protons and 16 neutrons. How many electron shells does an element of sulfur have?

Which one of the following statements about orbital energies is incorrect? A) The energy of a given orbital increases as the nuclear charge Z increases. B) In many-electron atoms the energy of an orbital depends on both n and l.

When solid lead (II) sulfide ore burns in oxygen gas, the products are solid lead (II) oxide and sulfur dioxide gas.? A. write the balanced equation B. how many grams of oxygen are required to react with 29.9 grams of lead II sulfide? C.

What are some differences between insect larvae and worms?