Dalton`s Laws worksheet Download

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AS-15
Dalton’s Atomic Theory of Matter
1. Which of the following statements is part of Dalton’s atomic theory of matter?
a. All atoms are identical
b. All atoms of a given element are identical
c. All atoms differ from one another
d. Atoms of the same element can have a different shape
2. Dalton suggested that atoms were indestructible and unchangeable to explain:
a. why elements combine in fixed mass ratios to form compounds
b. why mass is conserved in chemical reactions
c. why elements are characterized by the mass of their atoms
d. why compounds combine in fixed mass ratios in chemical reactions
3. Dalton said that elements are different distinguished from each other by:
a. the density of their solid forms
b. the shapes of their atoms
c. the charge on their ions
d. the size and mass of their atoms
4. Dalton’s atomic theory did NOT include the postulate that
a. Matter is made of small particles called atoms
b. Atoms contain electrons, protons and neutrons
c. Atoms are neither created nor destroyed in chemical reactions
d. Compounds always contain the same relative number and kinds of atoms
5. When elements react, their atoms combine in:
a. triplets
b. arbitrary proportions
c. a simple whole number ratio (more than one possible)
d. pairs
e. 1:1 ratios
6. 1.008 grams of hydrogen combines with 35.453 g of chlorine to form 36.461 g of
a pure compound (hydrogen chloride). Dalton's explanation for this experimental
fact might be:
a. hydrogen and chlorine atoms always combine in a 1:35 ratio.
b. this is a simple mixture of elements because the ratio isn't a whole number
ratio
c. hydrogen and chlorine atoms aren't created or destroyed in the process so
the reactant mass is the same as the product mass.
d. 1.008 atoms of hydrogen combines with 35.453 atoms of chlorine in this
reaction
7. Hydrogen combines with oxygen in a 1:8 mass ratio to form water. If every
molecule of water contains two atoms of hydrogen and one atom of oxygen, an
atom of oxygen must have a mass:
a.
b.
c.
d.
8 times the mass of a hydrogen atom
1/16 times the mass of a hydrogen atom
1/8 times the mass of a hydrogen atom
16 times the mass of a hydrogen atom