Chemistry Semester 1

Jeopardy

Unit 1

100

Unit 5Unit 4Unit 3Unit 2

200

300

400

500

100 100 100 100

200

300

400

500

200

300

400

500

200 200

300 300

400 400

500 500

Identify this piece of equipment

A

Unit 1 for 100

Graduated cylinder

How many significant figures are in 0.0024030?

A

Unit 1 for 200

How many significant figures are in 0.0024030?

Five significant figures

Convert 150 mm into km

A

Unit 1 for 300

Convert 150 mm into km

0.000150 km

What is the sum of 0.04 + 1.5 + 137 to the correct number of significant

figures?

A

Unit 1 for 400

What is the sum of 0.04 + 1.5 + 137 to the correct number of significant

figures?

0.04 + 1.5 + 137 = 138.54 139

Convert 12 cm into inches using the conversion 1 in = 2.54 cm

A

Unit 1 for 500

Convert 12 cm into inches using the conversion 1 in = 2.54 cm

12 cm * = 4.7 in

€

1in

2.54cm

Color is what type of property?

A

Unit 2 for 100

Color is what type of property?

Physical Property

Freezing of water is what kind of change?

A

Unit 2 for 200

Freezing of water is what kind of change?

Physical change

Define heterogeneous

A

Unit 2 for 300

Define heterogeneous

A mixture with two or more distinctive parts (salad,

pepperoni pizza)

What are the five ways to verify a chemical reaction?

A

Category 2 for 400

What are the five ways to verify a chemical reaction?

•Light emitted•Heat emitted/absorbed•Precipitate formed•Bubbles produced•Color Change

A

Unit 2 for 500Identify the areas of the graphBoilingMeltingFreezingContensingSolidLiquidGas

Solid

Gas

Liquid

Boiling / Condensing

Melting / Freezing

What is a positive ion called?

A

Unit 3 for 100

What is a positive ion called?

A cation

Which particles are responsible for the mass of an atom?

A

Unit 3 for 200

Which particles are responsible for the mass of an atom?

Protons & neutrons

How many neutrons are present in an atom of carbon with a

mass of 14?

A

Unit 3 for 300

How many neutrons are present in an atom of carbon with a mass of

14?

# neutrons = mass – atomic #

8 = 14 - 6

What is the correct symbol for an element with 11 protons, 10

electrons and 9 neutrons?

A

Unit 3 for 400

What is the correct symbol for an element with 11 protons, 10

electrons and 9 neutrons?

€

1120Na+

Explain Rutherford’s Gold Foil experiment and what he

discovered about the atom

A

Unit 3 for 500

Explain Rutherford’s Gold Foil experiment and what he discovered about the atom

Since most of the alpha particles passed through the foil, atoms must be mostly

empty space. Some of the positively charged particles bounced back showing

that there was a small dense area of positive charge with mass in the center of

the atom (the nucleus)

What part of a radioactive atom is unstable?

A

Unit 4 for 100

What part of a radioactive atom is unstable?

The nucleus

The half life of radon-222 is 20 minutes. After how many

minutes is there only 12.5% of the parent isotope left?

A

Unit 4 for 200

The half life of radon-222 is 20 minutes. After how many

minutes is there only 12.5% of the parent isotope left?

Amount Half life Time

100% 0 0

50% 1 20 min

25% 2 40 min

12.5% 3 60 min

What particle is emitted when cabon-14 decays into nitrogen-

14?

A

Unit 4 for 300

What particle is emitted when cabon-14 decays into nitrogen-

14?

A beta particle

C N + e

€

614

€

714

€

−10

Which two types of decay produce the same product?

A

Unit 4 for 400

Which two types of decay produce the same product?

Electron capture and positron emission

C + e B

C B + e €

614

€

614

€

−10

€

+10

€

514

€

514

Describe the mass and atomic number of an alpha particle AND its penetrating power

A

Unit 4 for 500

Describe the mass and atomic number of an alpha particle AND its penetrating power

Mass (protons + neutrons) = 4Atomic Number (protons) = 2

Penetrating Power = low (too massive)

€

24He

What is the charge on an atom in group 5?

A

Unit 5 for 100

What is the charge on an atom in group 5?

An atom in group 5 has 5 valence electrons, it wants to

gain 3 more. The charge will be -3

Give the electron configuration for Bromine

A

Unit 5 for 200

Give the electron configuration for Bromine

Full: 1s22s22p63s23p64s23d104p5

Noble Gas Shorthand: [Ar] 4s23d104p5

What happens to atomic radius (size) moving down a group?

WHY?

A

Unit 5 for 300

What happens to atomic radius (size) moving down a group?

Down a group the radius increases because each new

period requires the use of new orbitals (1s to 2s to 3s…etc)

What happens to the atomic radius (size) moving across a period to the right? WHY?

A

Unit 5 for 400

What happens to the atomic radius (size) moving across a period to the

right?

The size of an atoms gets smaller moving across a period because the

number of protons increase, pulling the electrons in the orbital in tighter

Is the trend for ionization energy the same or the opposite of the

trend for atomic radius? WHY?

A

Unit 5 for 500

Is the trend for ionization energy the same or the opposite of the trend for atomic radius? WHY?

The trend for ionization energy is OPPOSITE; as the size (radius) of the atom increases it is easier to remove an electron- therefore the energy required

to form an ion is lower