chemistry final review

An atom of an element with atomic number 8 and mass number 17 contains which of the following combinations of subatomic particles?

• 9 electrons, 8 protons, 8 neutrons
• 17 neutrons, 8 protons, 8 electrons
• 9 protons, 9 neutrons, 8 electrons
• 8 protons, 8 electrons, 9 neutrons

How do isotopes C-12 and C-14 differ from one another?

• C-14 has 2 more protons 
• C-14 has 2 more neutrons 
• C-14 has 2 more electrons
• C-14 has 14 protons

Which of the following particle(s) is found inside the nucleus?

• protons and neutrons
• protons and electrons
• neutrons and electrons
• electrons only

How many valence electrons are found in a Ba atom?

• 2
• 1
• 4
• 6

Which is true of Rutherford’s Gold Foil experiment?

• atoms are mainly empty space
• nucleus has almost all the mass of the atom
• nucleus only occupy very small part of the atom
• all of the options

Which of the following is a polar molecule?

• H₂
• O₂
• H₂O
• NaCl

What is the percent by mass of Calcium in Calcium oxide?

• 71%
• 17%
• 40%
• 47%

Which of the following is an example of an organic compound?

• C₂H₆
• CO₂
• O₃
• Na₂CO₃

Which is an example of a solution?

• sugar water
• muddy water
• orange juice
• milk

More organic compounds exist than inorganic compounds because 

• carbon has four valence electrons        
• carbon can form long chains
• carbon is a metalloid 
• carbon is very inreactive