PS Final Review 24-25

Nickel (Ni) is an effective conductor of heat and electricity. Select all of the other elements that most likely to have similar conductivities.

• Phosphorus (P)

• Copper (Cu)

• Krypton (Kr)

• Iodine (I)

• Potassium (K)

Tags

NGSS.MS-PS2-3

Elements with the same number of valence electrons are likely to:

• have the same atomic number

• have similar chemical properties

• have the same neutron count

• have the same number of energy levels

What type of reaction occurs when sodium reacts with chlorine to produce sodium chloride (NaCl)?

• synthesis

• decomposition

• single displacement

• double displacement

What is a key distinction between nuclear fission and nuclear fusion?

• Fission splits larger atoms, while fusion does not.

• Fission releases energy without needing an initial input, unlike fusion.

• Fission combines smaller atoms, while fusion does not.

• Fission requires energy to start a reaction, unlike fusion.

Tags

NGSS.HS-PS1-8

Burning wood and rusting iron are two processes that involve chemical changes. Why are these processes considered chemical changes?

• They change the color of the material.

• They produce new substances.

• They change the temperature.

• They absorb light.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In 1909, scientist Ernest Rutherford conducted an experiment by bombarding a thin sheet of gold foil with alpha particles. The observation that some particles were deflected at large angles led Rutherford to conclude that

• gold atoms have a dense, positively charged nucleus.

• gold atoms are capable of forming ionic bonds.

• gold atoms have electrons that are free to move.

• gold atoms are larger than other metal atoms.

What is the primary difference between the isotopes Plutonium-238 and Plutonium-242?

• number of neutrons in the nucleus

• position in the periodic table

• amount of positive charge

• chemical reactivity

Tags

NGSS.HS-PS1-8

What is the correct name for the compound with the formula FeO?

• iron oxide

• iron monoxide

• iron(II) oxide

• iron(III) oxide

Which of the following chemical equations illustrates the principle of conservation of mass?

• 2H₂ + O₂ → H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O

• 2Na + Cl₂ → 2NaCl

• Fe + S → Fe₂S

Tags

NGSS.MS-PS1-5

While the substance is a solid, at what temperature do the molecules of the substance have the greatest average kinetic energy?

• 5°C

• 60°C

• 40°C

• 0°C

Tags

NGSS.MS-PS1-4