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How do you work out how many electrons in an atom?
An atom's atomic number is the number of electrons.
What contribution to atomic theory resulted from Albert Einsteins work?
a new model of the atom that describe electrons as being in a cloud
How electrons work?
Electrons have negative charges, and unlike neutrons and protons are located on the outside of the atom. They are generally located in electron clouds around the atom, and stay there because of their attraction to protons that are in the nucleus of the atom.
How does covalent bonding satisfy the octet rule?
Electrons are shared- giving each atom a share of 8 electrons. Note that this "rule" does not work for hydrogen as only two electrons need to be shared to give each H atom the electronic configuration of He, helium.
How do you work out an atoms atomic number by looking at its electronic structure?
Count the total number of electrons.
Which of these does not follow the octet rule NF3 CO2 OF2 Br2 NO?
See the Related Questions to the left for how to solve this problem.First draw the Lewis Dot structures of each molecule, then count the valence electrons of each atom in the structures. Find the one that doesn't have eight!In this case, there is actually a little trick. To follow the octet rule, each atom must have 8 valence electrons in the structure, right? Therefore, the molecule must have an even number of total electrons for that to work. So which molecule does not have an even number of total electrons?
Would metal leaf electroscope experiment work if the terminal were made out of an insulator?
No it would not work because an insulator stops electrons from moving from moving to atom to atom so there is no way to get a charge to the metal leaves
Why was neil bohr important?
Niels Henrik David Bohr made several important contributions to the understanding of atomic structure as well as quantum mechanics. He developed the theory that electrons travel in orbits around the nucleus of the atom, and that the chemical properties of an element are determined by how many electrons exist in an atom's outermost orbit. He received a Nobel Prize in physics for his work. Later, he worked on the Manhattan Project developing the first atomic bomb.
How an insulator work?
All atoms have electrons that orbit the nucleus, we are concerned with the outermost orbit. The outer orbit shell can have from 1 to 8 electrons. The fewer electrons an atom has in this orbit the better it is at conduction (one or two electrons, it is easy to knock one of the electrons out of orbit and pass to the next atom). The more electrons you have, the better it is at insulating. Nothing is a perfect insulator, if you apply enough voltage the electrons will move (current will flow). This is why the insulation on conductors have a voltage rating.
Why was Dalton's model of the atom changed after Thomson's experiment?
John Dalton's atomic theory indicated that atoms were indivisible spheres. When JJ Thomson did his work with cathode ray tubes, he discovered that atoms contain electrons, which meant that the atom is not indivisible, that there are smaller particles within.
Who discovered electrons in an atom?
No one really dicsovered it on man had the idea but gave up on the project but later on someone finished his work
What is the Lewis dot structure for the following sif4 c2h6 mgh2 lih bh3?
.....H .....| H- Si - H .....| .....H SiH4 This is tough to draw without special characters to work with. Disregard the dots in the diagram. It was necessary to put those in there only so the H bonds would line up correctly. Basically Si has four valence electrons so single bonds extend out from it in the shape of a cross around Si in the center. There is one H atom at the other end of each single paired bond coming from the Si atom. This arrangement gives Si a stable octet of eight shared electrons. The H atoms are stable sharing 2 electrons each. I hope that helps.
