Free SACE Year 11 Chemistry Flashcard Review
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Nanoparticle size?
Approximately 1–100 nm.
Recover water from salt water?
Distil and collect condensed water.
Location of protons and neutrons?
The small dense nucleus.
Origin of emission lines?
Discrete electron energy decreases release photons.
Neutrons in chlorine-37?
37 − 17 = 20.
Chromium configuration?
[Ar] 3d⁵ 4s¹.
Copper configuration?
[Ar] 3d¹⁰ 4s¹.
Strontium configuration?
[Kr] 5s².
Convert moles to atoms?
N = nNₐ.
Calculate relative atomic mass?
Sum isotope relative mass × fractional abundance.
Radius down a group?
Generally increases with added shells.
Do repeats remove calibration bias?
No; calibrate against a reference.
What carries current in metal?
Delocalised electrons.
What carries current in molten salt?
Mobile ions.
Why is solid salt insulating?
Ions occupy fixed lattice positions.
Energy change when bonds form?
Energy is released.
Formula from Mg²⁺ and Cl⁻?
MgCl₂.
Electrons removed first from iron?
The 4s electrons.
Lone pairs on O in water?
Two.
Negative end of H–Cl?
Clδ⁻.