Chemistry - Semester 1 - Practice Final
Chemistry Final. Mrs. O'Gorman. Semester 1. 2010.
- 1.The sate of matter for an object that has definite shape and definite volume is
- A.
Solid
- B.
Liquid
- C.
Gaseous
- D.
Mixed
- E.
Elemental
- 2.Which of the following involved a chemical change?
- A.
Digesting food
- B.
Melting ice
- C.
Boiling water
- D.
Chopping wood
- E.
None of the above
- 3.A sample of an element contains only one kind of
- A.
Pure substance
- B.
Mixture
- C.
Isotope
- D.
Atom
- E.
None of the above
- 4.A pure substance made up of more than one kind of atom is called
- A.
An element
- B.
A compound
- C.
A heterogenous mixture
- D.
A homogenous mixture
- E.
An alloy
- 5.In a chemical change
- A.
A phase change must occur
- B.
A phase change never occurs
- C.
The original material can never be regenerated
- D.
The products are different substances from the starting materials
- 6.Which of these is a chemical property?
- A.
Helium is a gas
- B.
Water has a high specific heat
- C.
Water boils at 100ªC
- D.
Neon is very nonreactive
- E.
Potassium is a soft, shiny metal.
- 7.The symbol, Ca+1 can be used to represent
- A.
A calcium ion
- B.
A krypton ion
- C.
Potassium
- D.
A potassium atom
- E.
A krypton atom
- 8.In chemistry, a formula is used to represent
- A.
An element
- B.
An atom
- C.
A compound
- D.
All the above
- E.
None of the above
- 9.How many oxygen atoms are indicated in the formula Ca3(PO4)2?
- A.
6
- B.
4
- C.
13
- D.
8
- E.
None of the above
- 10.The total number of atoms indicated by the formula Fe2(SO4)3 is
- A.
5
- B.
7
- C.
19
- D.
10
- E.
17
- 11.The chemical formula Fe2(SO3)3 indicates
- A.
Three atoms of iron and three atoms of Sulfur
- B.
Six atoms of each element
- C.
Six atoms of oxygen
- D.
Two atoms of iron, three atoms of oxygen, one atom of sulfur
- E.
None of the above
- 12.How many protons, electrons, and neutrons respectively does 235U have?
- A.
92, 143, 235
- B.
92, 92, 143
- C.
92, 92, 235
- D.
74, 53, 235
- E.
74, 92, 235
- 13.Atoms of the same element having the same atomic number but different mass numbers are called
- A.
Orbitals
- B.
Isotopes
- C.
Neutrons
- D.
Isomers
- E.
Nuclei
- 14.An element's most stable ion forms an ionic compound with chlorine having the formula XCl2. If the ion of element X has a mass of 34 and 18 electrons, what is the identity of the element, and how many neutrons does it have?
- A.
Ar, 16 neutrons
- B.
Ca, 14 neutrons
- C.
Ar, 18 neutrons
- D.
S, 18 neutrons
- E.
K, 20 neutrons
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