Chemistry jeopardy

Unit 1

100

Name all the noble gas? 

helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).

200

Identify the bond type of NaCl?

Ionic bond

300

What happens to the atomic radius when you go down in a group? 

The atomic radius gets bigger

400

Identify the following forces from weakest to strongest:

Dipole-Dipole

London dispersion 

Ionic 

Hydrogen bond

Ion-Dipole

Covalent 

London Dispersion, Dipole-Dipole, Ion-Dipole, Hydrogen bond, Covalent, Ionic   

500

Silicon has a 3 stable isotopes: 28Si, 29Si, 30Si, with abundances of 92.18%, 4.71% and 3.12% respectively. 

The corresponding masses are 27.98µ, 28.98µ, 29.97µ, 

Calculate the average atomic mass of silicon.

= ( 27.98µ X 0.9218  ) + (28.98 µ X 0.0417) + (29.97 X 0.0312) 

= 27.94 µ

Unit 2

100

In which type of reaction do elements in two compounds trade places, producing two new compounds?

Double Displacement 

200

Identify this reaction:

Ca(OH)2 + H2SO4 -> CaSO4 + H2O

Neutralization 

300

Write and balance the following equation:

AlBr₃+ K₂SO₄---> KBr+ Al₂(SO₄)₃

 ^{2AlBr₃+ 3K₂SO₄---> 6KBr+ Al₂(SO₄)₃}

400

Find the products, balance and find the type of reaction of the following equation:

NH 4 Cl (aq) + LiOH (aq)  LiCl (aq) + NH 4 OH (aq)

Equation 

NH₄Cl(aq) + LiOH(aq) --> LiCl(aq) + NH₃(g) + H2O (l)

Type of reaction 

Double Displacement 

500

A chemical reaction when the following aqueous solutions are mixed together: sodium sulphide and Iron(II) sulphate. Identify the spectator ions and also the net ionic equation.

Spectator ions - Na+ and SO42-

Net Ionic equation - S2(aq)- + Fe2+(aq) ---> FeS(s)

Unit 3

100

Calculate the number of moles in the following equation:

2955 kg of Ag

n= 2.74x10⁴ mol 

200

Find the precent for each element in the following compound:

Al₂(SO₄)₃

Al=15.77% S=28.12% O=56.11%

300

A compound has 64.9% carbon, 13.5% hydrogen and 21.6% oxygen. Its molecular mass is 74g/mol. What is the molecular formula. 

C₂H₄O₂

400

Silver metal can be recovered from waste silver nitrate solutions by reaction with copper metal. What mass of silver can be obtained using 50 g of copper?

2AgNO3(aq)+Cu(s)→2Ag(s)+Cu(NO3)2(aq)

170g

500

 Nitrogen and hydrogen at high temperatures are converted to ammonia using the following reaction known as the Haber Process.

3H2 + N2 --> 2NH3
When 400 grams of H2 are added to an excess amount of N2, 104 grams of NH3 are formed. Calculate the percent yield?

4.5%

Grade 10

100

What is the formula for Strontium Fluoride? 

SrF₂

200

What is a chemical reaction?

A change in matter that produces new substances with new properties.

300

What type of chemical reaction is this? Water ----> hydrogen + oxygen

Decomposition reaction

400

What is the term used for substances that react together in a chemical reaction?

Reactants 

500

What is the formula for Carbon tetrachloride?

CCl₄

Grade 9

100

Name the following compound:

 NO₂

Nitrogen Dioxide 

200

Write the chemical formula for calcium chloride?

CaCl₂

300

What is a compound? 

Its is made up of two or more exiting parts of an element 

400

these are pure substances that cannot be broken down into other substances by physical and chemical means?

Elements 

500

Protons and neutrons join together to create the_________.

Nucleus