Chemistry ATAR 11 - Atomic Structure

what is atomic radius

Distance from nucleus to outermost electron.

what is the shielding effect

Core electrons shield valence electrons from attractive force of the nucleus

what is core charge

a measure of the attractive force felt by the valence electrons towards the nucleus

number of protons-number of inner electrons

what is first ionization energy

the energy required to remove the first electron from an atom

what is second ionization energy

energy required to remove the second electron

what is electronegativity

ability of an atom to attract electrons

who created the plum pudding model

JJ Thomson

what is the plum pudding model

It states that atoms are a ball of positive charge, with negative electrons embedded in it

who created the nuclear model

Ernest Rutherford

what is the nuclear model

it has a tiny positive nucleus which is surrounded by electrons

what is the planetary model

electrons orbit a central point which is the nucleus

who created the planetary model

Niels Bohr

what is the quantum model

model we use today, puts electrons within regions called orbitals instead of in specific orbits

who created the quantum model

Erwin Schrodinger

what is atomic number

number of protons in the nucleus

what is mass number

the total number of protons and neutrons in a nucleus.

what is atomic weight

Average of the mass numbers of all isotopes

what are isotopes

atoms with the same number of protons but different number of neutrons

what does AAS stand for

atomic absorption spectroscopy

what is atomic absorption spectroscopy

technique used to identify the presence and concentration of substances by analysing the spectrum produced when a substance is vaporised and absorbs certain frequencies of light

what is spectroscopy

the study of the interaction between matter and electromagnetic radiation