AP Chemistry ChAPter 2 Quiz

10 Questions | By Joleechem

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Questions and Answers

1.

Which of the following statements from Dalton’s atomic theory is no longer true, according to modern atomic theory?
- A.
  
  Elements are made up of tiny particles called atoms.
- B.
  
  Atoms are not created or destroyed in chemical reactions.
- C.
  
  All atoms of a given element are identical.
- D.
  
  Atoms are indivisible in chemical reactions.
- E.
  
  All of these statements are true according to modern atomic theory.
2.

Which one of the following statements about atomic structure is false?
- A.
  
  An atom is mostly empty space.
- B.
  
  Almost all of the mass of the atom is concentrated in the nucleus.
- C.
  
  The protons and neutrons in the nucleus are very tightly packed.
- D.
  
  The number of protons and neutrons is always the same in the neutral atom.
- E.
  
  All of the statements given are true.
3.

The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium-185 has in its nucleus
- A.
  
  75 protons, 75 neutrons.
- B.
  
  75 protons, 130 neutrons.
- C.
  
  130 protons, 75 neutrons.
- D.
  
  75 protons, 110 neutrons.
- E.
  
  Not enough information is given.
4.

All of the following are true except:
- A.
  
  Ions are formed by adding electrons to a neutral atom.
- B.
  
  Ions are formed by changing the number of protons in an atom’s nucleus.
- C.
  
  Ions are formed by removing electrons from a neutral atom.
- D.
  
  An ion has a positive or negative charge.
- E.
  
  Metals tend to form positive ions.
5.

Which of the following are incorrectly paired?
- A.
  
  K, alkali metal
- B.
  
  Ba, alkaline earth metal
- C.
  
  O, halogen
- D.
  
  Ne, noble gas
- E.
  
  Ni, transition metal
6.

Which of the following is incorrectly named?
- A.
  
  Pb(NO3)2, lead (II) nitrate
- B.
  
  NH4ClO4, ammonium perchlorate
- C.
  
  PO4 3-, phosphate ion
- D.
  
  Mg(OH)2, magnesium hydroxide
- E.
  
  NO3 -, nitrite ion
7.
Write the names of the following compounds in order: (hint: use all lower case letters and capitals in parenthesis for roman numerals)
1. FeSO₄
2. NaC₂H₃O₂
3. KNO₂
4. Ca(OH)₂
5. NiCO₃
8.

In a combustion reaction, 46.0g of ethanol reacts with 96.0g of oxygen to produce water and carbon dioxide. If 54.0g of water is produced, what mass of carbon dioxide is produced? Use proper sig figs. (hint: law of conservation of mass)

Discuss
9.

Identify the periodic groups associated with Alkali metals, Alkaline earth metals, Halogens, Noble gases and transition metals, in order. (use group numbers 1 through 18 and a series of groups with a dash, ex: 1-3)
10.
Write the chemical formulas for the following compounds or ions, in order. Place subscripts, parenthesis, and charges where they are needed. Do not 'lower' the subscripts and leave a space between the ion and its charge. example: phosphate ion= PO4 3-, copper (II) nitrate = Cu(NO3)2, chloride ion = Cl -
1. nitrate ion
2. aluminum oxide
3. ammonium ion
4. perchloric acid
5. copper (II) bromide

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