Atomic Structure Flashcards
What is the radius of an atom ?
-10
1 x 10^ Metres
How can the electron arrangements change ?
Move further away from the nucleus
Or
Closer to the nucleus
What happens if the electrons are closer to the neutron ?
They have a higher energy level
What happens if the electrons are further away from the neutron ?
They have a lower energy level
The number of electrons is equals to the number of neutrons in an atom, what does that mean ?
Atoms have no overall charge
What is the number of protons in an atom called ?
Atomic number
What is the total number of protons and neutrons in an atom called ?
Mass number
Is the mass number situated at the top or the bottom ?
Top
Is the atomic number situated at the top or the bottom ?
Bottom
What are isotopes?
Atoms of the same element with different numbers of neutrons
If the atom loses an electron does it turn negative or a positive ion ?
Positive
If the atom gains an electron does it turn negative or a positive ion ?
Negative
Before the discovery of electrons what were atoms thought of ?
Tiny spheres that could not be divided
What did the discovery of the electron lead to ? [which model]
Plum pudding
What did the plum pudding state ?
A ball of positive charge with negative electrons imbedded in it
The results of the alpha particle scattering led to the discovery that … ?
The mass what at the nucleus of the atom
Nucleus was charged
What model did the results of the alpha particle scattering experiment lead to ?
Nuclear model
What did Neil Bohr discover ?
Electrons orbit the nucleus at specific distances
What did Chadwick discover ?
Neutrons within the nucleus
Explain why chlorine and fluorine form covalent bonds ?
They are both non-metals
Complete the sentence: in covalent bonds, electrons are …
Shared
In iconic bonds, electrons are …
Transferred
What is the name given to the structure of diamond, graphite and silicon dioxide ?
Giant covalent
How many bond does each carbon have in diamond ?
4
