Chemistry Quiz 3 Review

Balancing Chemical Equations

100

magnesium metal added to oxygen gas                        reacts to make       magnesium oxide

2Mg + O₂ --> 2MgO

200

potassium metal  is added to oxygen gas     and it reacts to produce           potassium oxide

4K + O₂  --> 2K₂O

300

Iron and iodine (diatomic) react to make iron iodide

2Fe + 3I₂ --> 2FeI₃

400

hydrochloric acid is added to  strontium oxide they produce  water and strontium chloride

2HCl + SrO --> H₂O + SrCl₂

500

Aluminum is heated in air, reacting with oxygen and produces aluminum oxide

2Al + 3O₂ -->  2Al₂O₃

Vocabulary

100

Positively charged particle located in the nucleus

proton

200

An atom that has gained or lost electron(s)

Ion

300

Isotope 

A heavier version of an element with additional neutrons

400

The parts of an atom involved in bonding (be specific)

Valence Electrons

500

Compare and Contrast Covalent and Ionic Bonding (at least 2 similarities and 2 differences)

Similarities: Both involve electrons, both are trying to achieve full outer shells, both involved in chemical reactions

Differences: how they go about getting the electrons (win/lose=ionic, sharing=covalent), the types of elements that can do this type of bonding (metals & non-metals ionic, covalent is between non-metals)

Guess Who?

100

I am the lightest and most prevalent element in the universe

Hydrogen

200

I have 29 electrons.  Who am I and how much do I weigh?

Copper, 63 amu

300

Chemists think we are a bore.  Our group of 6 are so stable, we wont react to anyone.  

Nobel gases

400

I am a metal with the same number of valence electrons as Cesium, but am even more reactive.

Francium

500

This is one of the most versatile elements because it can form ionic and covalent bonds and have 4 valence electrons available for bonding.  I have 2 electron shells

carbon

Diagramming Bonds (Dot or Solar System)

100

Lithium Floride

Ionic LiF

200

Carbon Dioxide

Dot CO2

300

Sodium Oxide

Ionic  Na2O

400

C2H2

Dot Carbon triple bonded

500

C2H6O

Dot Diagram

Chance

100

Draw 2 hydrogens bonding covalently

H2

200

How can you tell if a chemical reaction is ionically or covalently bonded?

Metal + non-metal = ionic, non-metals=covalent

300

How many neutrons does Na have?

12

400

CH₂O₄

Carbon and Hydrogen double bonded

500

What are the 7 diatomic elements?

H, N, O, F, Cl, Br, I