Physical Science Final Review

Atoms of which two elements will form an ionic bond?

• Mg and Cl
• N and O
• Fe and Co
• Rb and Al

Which compound will most likely be formed when lithium (Li) and nitrogen (N) are chemically combined?

• LiN
• Li₃N
• LiN₃
• Li₃N₃

Which compound results from covalent bonding?

• NH₄Cl
• K₂SO₄
• NaCl
• C₆H₁₂O₆

Why are beta particles able to penetrate objects better than alpha particles are?

• because beta particles are larger than alpha particles
• because beta particles are smaller than alpha particles
• because beta particles are negatively charged, while alpha particles are neutral
• because beta particles travel in a straight line, while alpha particles travel in waves

This diagram represents a closed series circuit. What would happen if the voltage were doubled?

• The current would quadruple.
• The current would double.
• The current would remain constant.
• The current would be reduced by half.

How would decreasing the diameter of the wires in a circuit influence the resistance and flow of electrons in the circuit?

• It would decrease the resistance, causing fewer electrons to flow through the circuit.
• It would increase the resistance, causing fewer electrons to flow through the circuit.
• It would decrease the resistance allowing more electrons to flow through the circuit.
• It would increase the resistance by allowing more electrons to flow through the circuit.

How could the strength of an electromagnet be increased?

• by reducing the length of the core of the electromagnet
• by using rubber material as the core for the electromagnet
• by decreasing the amount of current in the electromagnet
• by increasing the number of coils in the wires of the electromagnet

Student X pushes a 10-N box with a force of 2 N. At the same time, Student Y pushes the same box with a force of 6 N, but in the opposite direction. Which would most likely occur?

• The resultant force on the box would be 8 N.
• The resultant force on the box would be 18 N. 
• The box will move toward Student X.
• The box will move toward Student Y. 

This diagram represents a neutral atom of fluorine-19. Which best describes the structure of fluorine-19?

• 2 electrons in the first energy level; 7 electrons in the second energy level
• 2 electrons in the first energy level; 8 electrons in the second energy level
• 9 protons and 9 neutrons in the nucleus
• 10 protons and 9 neutrons in the nucleus

Which equation represents a decomposition chemical reaction?

• 2S + 3O₂ → 2SO₃
• 2NaCl → 2Na + Cl₂
• 2K + 2H₂O   → 2KOH + H₂
• Zn + 2HCl →      ZnCl₂ + H₂