What element has 3 Electrons? What element has 148 neutrons in the nucleus? And which element has 45 neutrons?

Question

Even If you only know one that would help aLOT! Thankyou soo much

Ok ok chill guys I figured it out ALL on my own... and practically no one tried to help me :-( I am very dissipoinetd!

NExt time don't strain yourselves

Answer 1

idk. but here's a link to help you.

http://www.chemicool.com/

Answer 2

Check your periodic table: http://en.wikipedia.org/wiki/Periodic_table

Lithium, the third element has 3 electrons and three protons in its nuclease. To hold itself together it has 4 neutrons as well. However a radioactive isotope would have more neutrons. Read more to figure out how I did that; but a clue is it has an atomic mass of 7 and atomic number of 3.

So the element 45 Rhodium (http://en.wikipedia.org/wiki/Rhodium) has 45 electrons, 45 protons, and 45 neutrons. But, an isotope has more neutrons. If you added more electrons or protons then you would magically change the element to the next higher element.

Uranium (U: http://en.wikipedia.org/wiki/Uranium) is a radioactive material and it has several different isotopes. It can have between 141 and 146 neutrons; depending on the type of uranium. U235 is more common, but U238 is what nuclear weapons need.

The number of neutrons in a nuclease = the atomic mass of the element - the atomic number (number of protons) for the basic non-isotope form. Isotopes have more neutrons.

Americium (Am: http://en.wikipedia.org/wiki/Americium) has an isotope Am243. If you subtract 95 from 243 you get 148 neutrons. So Americium is one answer; you need to figure out the others.

Use the atomic weight and subtract the atomic number to find the number of neutrons then add extra neutrons for isotopes.

According to Wikipedia: http://en.wikipedia.org/wiki/Atomic_weight
"The atomic mass (ma) is the mass of an atom at rest, most often expressed in unified atomic mass units.[1] The atomic mass may be considered to be the total mass of protons, neutrons and electrons in a single atom (when the atom is motionless). The atomic mass is sometimes incorrectly used as a synonym of relative atomic mass, average atomic mass and atomic weight; however, these differ subtly from the atomic mass. The atomic mass is defined as the mass of an atom, which can only be one isotope at a time and is not an abundance-weighted average."