Final Jeopardy

Atomic Structure

100

What subatomic particle determines the identity of an element?

Protons

200

Draw the atomic structure for the following element:

Lithium-7

How many protons, neutrons, and electrons are in this atom?

3p, 4n, 3e

300

An atom has 17 protons, 18 electrons, and 18 neutrons. 

1. Identify the element

2. Write the name using correct isotope and/or ion notation.

Cl -1

Chlorine-35

400

Calculate the number of neutrons in the isotope:

Carbon-14

8 neutrons

500

An unknown atom has 15 protons, 16 neutrons, and 18 electrons

Identify:

1. The element

2. The mass number 

3. Whether it is an ion

4. Its charge

1. Phosphorus

2. 31

3. Yes, its an ion

4. -3 charge

Chemical Reactions

100

What are the starting substances in a chemical reaction called?

Reactants

200

What law states that matter cannot be created or destroyed during a chemical reaction?

Law of Conservation of Mass

300

Classify the following reaction:

2H₂ + O₂ --> 2H₂O

Synthesis Reaction

400

Balance the equation:

___Fe + ___O₂ --> ___Fe₂O₃

4Fe + 3O₂ --> 2Fe₂O₃

500

This reaction is most likely what kind of reaction?

Fe + CuCO₃ --> ? + ?

Based on this information, predict the outcome of the equation.

Fe + CuCO₃ --> Cu + FeCO₃

Lewis Dot

100

How many valence electrons does Oxygen have?

6 Valence Electrons

200

Is CO₂ ionic or covalent? Explain why.

Covalent because both C and O are non-metals

300

Which compound below will most likely form an ionic bond?

1. CO₂

2. H₂O

3. MgCl₂

4. CH₄

MgCl₂

400

Identify the compound that has the strongest bonds

1. CH₄

2. CO₂

3. MgO

4. N₂

N₂

500

Two students are arguing over how to draw the compound:

H₂NCl

One student puts Cl in the center because it has more valence electrons. One student chooses N. 

Who is correct? Draw the correct Lewis Structure for the compound.

N in center

Motion

100

What is the difference between speed and velocity?

Velocity includes direction 

200

A car changes direction while keeping the same speed. Is the car accelerating, yes or no? Explain.

Yes. Any change in speed or direction = acceleration

300

Two students run the same distance in the same amount of time. Student A runs north while Student B runs south.

1. Do they have the same speed?
2. Do they have the same velocity?
3. Explain your reasoning.

1. Yes, same speed

2. No, different velocity

3. Velocity includes direction, and they moved in opposite directions.

400

A runner travels 120m in 15s. What is their speed?

8m/s

500

A ball starts at rest and accelerates west at 4m/s² for 6 seconds. What is its final velocity?

24m/s west

Waves & Energy

100

Which wave has more energy? 

A short wavelength or a long wavelength?

Short wavelength (High frequency)

200

Draw the electromagnetic spectrum from lowest energy to highest energy.

Radio, Micro, Infared, Visible, UV, X-Ray, Gamma

300

One wave has a frequency of 15Hz and one has a frequency of 5Hz. Which has more energy and why?

15Hz wavelength. Higher frequency = More energy

400

A wave has a wavelength of 2 meters, while another wave has a wavelength of 10 meters.

1. Which wave has the higher frequency?
2. Which wave has more energy?
3. Explain your reasoning.

1. 2 meter wave

2. 2 meter wave

500

Explain why gamma rays are more dangerous than radio waves using wavelength, frequency, and energy

Gamma rays have a higher frequency and therefore a shorter wavelength. Because it has a higher frequency, there is high energy.