Atomic Structure
This particle determines the identity of an element.
What is the number of protons?
This type of bonding occurs when electrons are transferred between atoms.
What is ionic bonding?
This is the unit used to measure the amount of substance.
What is the mole?
What is the chemical formula for sulfuric acid?
What is H₂SO₄?
This piece of glassware gives the most accurate measurement of a fixed volume.
What is a volumetric pipette?
These particles are responsible for chemical bonding.
What are valence electrons?
Diamond and graphite are examples of this type of lattice.
What is a covalent network lattice?
How many moles are in 44 g of CO₂?
What is 1 mole?
What is the formula for calcium carbonate?
What is CaCO₃?
This technique separates an insoluble solid from a liquid.
What is filtration?
This type of radiation consists of high-energy electromagnetic waves.
What are gamma rays?
Water has a relatively high boiling point because of this intermolecular force.
What is hydrogen bonding?
Calculate the molar mass of NaOH.
What is 40 g mol⁻¹?
What is the formula for ammonium nitrate?
What is NH₄NO₃?
This is the independent variable in a limiting reagent precipitation practical where concentration is changed.
What is the concentration of one reactant?
An isotope differs from another isotope of the same element because it has a different number of these particles.
What are neutrons?
This type of solid conducts electricity when molten but not when solid.
What is an ionic solid?
A solution contains 0.50 mol in 2.0 L. What is its concentration?
What is 0.25 mol L⁻¹?
What is the formula for sodium sulfate?
What is Na₂SO₄?
Students obtained a low precipitate mass because they did not dry the precipitate completely. This error will result in what?
What is a higher mass?
This experiment provided evidence that atoms contain a small, dense, positively charged nucleus.
What is Rutherford's gold foil experiment?
Explain why graphite conducts electricity but diamond does not.
Graphite has delocalised electrons that can move through the layers, whereas all of diamond's electrons are involved in covalent bonds.
Calculate the number of particles in 2.0 mol of helium.
What is 1.20 × 10²⁴ particles?
Name the compound with the formula K₂CH3COO.
What is potassium acetate?
State two ways to improve the reliability of a precipitation experiment.
Repeat the experiment; average the results; use calibrated equipment; ensure consistent drying/filtering methods (any two).