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Q: Why don't we count electrons in determining the atomic mass?
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Continue Learning about Chemistry

Name the 8 valence electrons for argon?

i dont no


How many protons electrons and neutrons are there in an atom that has an atomic number of 8 and a mass of 15?

Learn that the atomic number means the number of protons. The mass number is the number of protons and the number of neutrons. So if we take the number of protons from the mass number then we get the number of neutrons that are present (mass umber - atomic number = number of neutrons). in this case 15 - 8 = 7. Since you dont mention there is any charge on the atom ill assume that its charge is neutral. For an atoms charge to be neutral then the positive charges from protons must equal the negative charges from electrons and vica versa. So for this to be the case with 8 protons then we must have 8 electrons.


How many electrons magnesium have?

Magnesium is a metal element. There are 12 electrons in a single atom.


What element has 5 protons and 6 electrons?

The number of protons determines the name of the element: 5 Protons = Boron (B) (just look at the periodic table and the atomic number corresponds to the number of protons the element has)The atomic mass of the element determines the isotope of the atom which is simply Protons (5) + Neutrons (6) = atomic mass (11) so the isotope of this Boron atom is written as 11B (this is short hand the more formal version is written with the atomic number written right below the atomic mass, but i dont know how to do that on the computer)Now the last thing is the charge which is Protons (5) - Electrons (2) = Charge (3+) you subtract the number of electrons because electron's charge is negative one) so the final answer will look like this 11B3+


What is the principal quantum number the n for the valence electrons in lead?

dont now

Related questions

What information must be researched for the atomic mass to be obtained?

well the electrons must be researched and the atomic number and since the protons are equal to the electrons you dont have to go crazy looking for it.i dont know how to find the atomic mass though


An atom with an atomic number of 9 and a mass number of 19 would have an atomic mass of what?

The atomic number of the potassium is 19. So the number of protons and electrons is 19 in the atom of potassium. The number of neutrons can be calculated as mass number minus atomic number. It comes to be 39 minus 19. That is 20.


Atomic number of protons?

protons dont have an atomic number as they are not elements


How do you count water amount in aquarium?

you dont count you measure it


How can you calculate the number of electrons in an atom?

For a neutral atom they must have equal numbers of protons and electrons. The atomic number is the number of protons in an atom of an element. Find the atomic number by looking at the periodic table of elements.


What are the twenty largest cities in Florida?

i dont know dont care dont count on it.


How do you get population?

you go to Everybodys House and count how many people live in that particular House. and Dont forget to count the hobos, they count to you know even If they dont live in a house.


What is the atomic symbol of phosphorus?

i dont know its symbol it might be pu but the atomic # is 94 and the atomic mass is 244 i dont know its symbol it might be pu but the atomic # is 94 and the atomic mass is 244


How many islands of Como are there?

dont know why dont you go count them!


What does current of electrons moving through resistors change into?

for a fact it is heat or electrons dont belive me go to quizlet and ask them if you dont belivr me!


What is a counting restriction?

dont allowed to count


How many electrons does an element have if it has 17 protons and 18 neutrons?

i dont know, i hate chemistry it sucks! i wanna no 'if an element has 17 protons, how many electrons are there?' sorry i didnt no the answer