The mass of an atom may be determined by adding the masses of the protons and neutrons in the nucleus. Why is it unnecessary to include the electrons when determining the mass of an atom?

Explain some ways in which minerals are classified

What does the atomic number tell you about the atom of the element

Silicon and germanium are examples of A. semiconductors B. metals C. halogens D. nonmetals

How many moles of ammonia (nh3 will be produced from 4.0 moles of nitrogen (n2?

Elements on the periodic table are organized by what? increasing atomic number decreasing atomic mass increasing valence electrons decreasing neutron count

Restate Newtons first law in terms of acceleration

Why is burning is not a recommended method of disposing plastics

Why do cells have a plasma membrane? A. to separate protein from the nucleus B. to distinguish plants from animals C. to define the size of the cell D. to separate the inside of the cell from its enviroment

Base on its molecular mass, what is the molar mass of iron

For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply. Na, SO4+Hg (NO3) 2HSO4+2NaNO3 Choose one or more: A. Hg2S04 B. Na2S04 C. Nat D. NO3 E. SO42- F. Hg2 (NO3) 2 G. NaNO3 H.