Topic #1: Atomic structure and the Periodic Table Flashcards
What and where is the mass number?
The number of protons and neutrons in a nucleus, found at the top
What is found underneath the chemical symbol?
The atomic number (the number of protons/electrons)
What is a mixture?
Two or more elements/compounds that aren’t chemically bonded together
Name the 5 mixture separation techniques.
Filtration Simple Distillation Fractional Distillation Chromatography Crystallisation
Describe the plum pudding model.
A ball of positive charge (protons and neutrons) with electrons embedded throughout it
How do we know that the plum pudding model is incorrect?
Rutherford scattering proved that the must have been space in between the electrons and nucleus
Explain Rutherford scattering and its results
Fire alpha particles at electron sheet, some curve away completely, some partially change direction, other just pass straight through.
What are the masses and charges of the sub-atomic particles?
Neutron - Mass 1, no charge
Electron- negligible mass, negative charge
Proton - Mass 1, positive charge
What is the radius of an atom? (roughly)
0.1 nm
What do you call a version of the atom with a different number of neutrons?
An isotope
How do you calculate relative atomic mass using abundances?
(% of isotope 1 × mass of isotope 1) + (% of isotope 2 × mass of isotope 2) ÷ 100
What do elements in the same periodic table group share?
The same number of outer shell electrons
If an element is a metal will it produce a positive or negative ion?
Positive ions
Where are metals on the periodic table?
The left and bottom
What are the group 0 elements?
Noble gases-
