Flashcards in Topic #1: Atomic structure and the Periodic Table Deck (22):
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.
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)
What do you call a version of the atom with a different number of neutrons?
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?
Where are metals on the periodic table?
The left and bottom
What are the group 0 elements?
What are the Group 0 traits?
Higher boiling point as you move down the table
What are Group 1 elements?
What are the alkali metal properties and reactions?
Water- vigorous, hydrogen produced
Oxygen- vigorous, oxide produced
Chlorine- vigorous, white salt produced
Reactions more aggressive as you go down table
Shiny, dulls quickly
Soft (easy to cut)
What are the Group 7 elements?
What are the halogenic properties?
Produce salts during reactions
Melting/boiling points go up with mass, reactivity decreases
More reactive halogen displaces a less reactive one form its aqueous solution
What are the transition metals physical properties?
Hard, strong and tough, but malleable (unlike alkali metals)
Higher melting points and densities than Group 1 metals