Questions & Answers for: atomic number

...molecules N2 and O2 What is the atomic-weight for N (Nitrogen)? For oxygen? The atomic-weight determines the number of protons in the nucleus of the atom, and the number of electrons at each

How many grams of aluminum acetate contain 2.24 x 1022 atoms of hydrogen? 1 Look up the formula for the aluminum acetate. 2 Count the number of Hydrogen atoms per molecule: Call that nH. 3 Dividing ...

atoms of hyrdrogen gas in tow moles how many atoms of nitric acid in 0,25 moles Hydrogen gas is a diatomic substance: Each molecule contains two hydrogen atoms. A mole of hydrogen gas contains 6.02*10

atomic number of Eieinsteinium trioxide i have a project and it asks us to build a model f a compound using a model im trying to do Eieinsteinium trioxide but cant find its atomic number? what do i do

what is the relationship between the atomic number and atomic mass of an element What is the relationship between atomic mass and atomic numbers http://en.wikipedia.org/wiki/Atomic_mass

...atomic number It is the number of protons, positively charged particles, in the atom's nucleus. It therefore tells us relatively how massive an atom is, and its position in the Periodic Table of the ...

what is chemistry this number tell you the number of protons in an atom The "atomic number" for an element is the number of protons, e.g., helium has 1, hydrogen has 2, some uranium has 235, et cetera

...we list the different elements by their proton, or atomic, number. The periodic table of elements is a chart of all of the elements that have been discovered so far, in order by their atomic

...Atomic protons? The nucleus of the atom of each stable element has a certain number of protons, and except for hydrogen, also neutrons. These numbers are what differentiate the elements and give them ...

Atomic number to change Proton How does the atomic number that is assigned to an atom change An atomic number assigned to an atom changes when the number of protons in the nucleus of the atom changes.