Quiz

Dalton's atomic theory: Page 1 2 3 4 5 6 Back Next

The law of fixed composition

Quiz: Dalton's Atomic Theory

1. Hydrogen combines with fluorine in a 1:19 weight ratio to form hydrogen fluoride. If every molecule of hydrogen fluoride contains one atom of hydrogen and one atom of fluorine, an atom of fluorine must weigh:

	19 times the mass of a hydrogen atom		1/38 times the mass of a hydrogen atom
	1/19 times the mass of a hydrogen atom		38 times the mass of a hydrogen atom

2. Dalton based his relative atomic weight scale on:

oxygen

helium

carbon

lithium

hydrogen

3. 1.008 grams of hydrogen combines with 35.453 g of chlorine to form 36.463 g of a pure compound (hydrogen chloride). Dalton's explanation for this experimental fact might be:

	hydrogen and chlorine atoms aren't created or destroyed in the process so the reactant mass is the same as the product mass.
	hydrogen and chlorine atoms always combine in a 1:35 ratio.
	one atom of hydrogen combines with 35.453 atoms of chlorine in this reaction
	this is a simple mixture of elements because the ratio isn't a whole number ratio
	chlorine accepts hydrogen's electron to form polar covalent hydrogen chloride

4. Dalton viewed chemical change as:

	a transfer of protons		creation and destruction of atoms
	a rearrangement of atoms		a change of atoms from one type into another
	a nuclear exchange		a transfer of electrons

5. When elements react, their atoms combine in:

	arbitrary proportions
	1:1 ratios
	simple whole number ratios (more than one possible)
	pairs
	a simple whole number ratio (unique for each pair of elements)
	triplets

Dalton's Atomic Theory
Page 1: Introduction
Page 2: Dalton's assumptions Five steps forward and one step back.
Page 3: Atoms in compounds An "invisible hand" fixes atom ratios in compounds
Page 4: Atoms in reactions Dance of the atoms
Page 5: Learning check Take a quiz on Dalton's Atomic Theory
Page 6: References and resources

General Chemistry Online! Quiz

	Dalton's Atomic Theory
	Page 1: Introduction Page 2: Dalton's assumptions Five steps forward and one step back. Page 3: Atoms in compounds An "invisible hand" fixes atom ratios in compounds Page 4: Atoms in reactions Dance of the atoms Page 5: Learning check Take a quiz on Dalton's Atomic Theory Page 6: References and resources