SITAA Chapter 4

Terms

100

Two or more atoms linked together to make a substance with unique properties.  

What is a molecule? 

200

A chemical bond that is made by sharing electrons.  

What is a covalent bond? 

300

An atom's outermost electrons

What are valence electrons?  

400

A weak bond between certain kinds of molecules caused by the attraction of a hydrogen atom in one molecule to an unshared pair of electrons on the other molecule.  

What is a hydrogen bond? 

500

In any non-nuclear process, the total mass of everything involved must remain the same.  

What is the Law of Mass Conservation? 

Lewis Structures

100

Draw the Lewis structure for indium (In).

In with 3 dots

200

Draw the Lewis structure for Beryllium (Be).

Be with 2 dots

300

Draw the Lewis structure for PI₃

P has 5 dots and I has 7 dots 

I P I

  I

400

Draw the Lewis structure for H₂S_e

H gets 1 dot and Se gets 6

500

The Lewis structure for the ion that indium will become to make an ionic compound.  

What is In³⁺?

Random

100

The three most common phases of matter

What are solid, liquid, gas? 

200

A certain temperature something must reach in order to melt. 

What is the melting point? 

300

The molecules of a substance form a pattern and stay in that pattern.  What phase is the substance in? 

What is a solid? 

400

Molecules move faster when you ________ energy.  

What is add?  

500

You have a sample of solid cholesterol (C₂₇H₄₆O) and a sample of Epsom salt (MgSO₄).  Which has the higher melting point? 

What is Epsom salt? 

Random 2.0

100

A covalent molecule that has an even distribution of electrons so there are no net charges in the molecule itself. 

What is a nonpolar molecule?  

200

You see water droplets on appearing on the surface of a glass.  Where is the water coming from, and what is the name of the process that is making them? 

What is water vapor in the air and condensation (or condensing)? 

300

Which of the following can form hydrogen bonds: H_2, NH₃, PCI₃?

What is NH₃?

First, to make hydrogen bonds, you need hydrogen atoms.  Thus, PCl₃ can't do it.  However, you need more than just hydrogen.  You also need unshared electrons for the hydrogens to get close to.

400

You are testing two liquids.  You try mixing both of them with water.  Liquid A mixes with water well.  Liquid B does not.  Which liquid is non polar? 

What is liquid B? 

Water is polar, and polar molecules do not mix well with non polar molecules.  

500

Which will have the highest melting point: H₂S, NBr₃, NaBr? 

What is NaBr? 

Ionic compounds have higher melting points than covalent compounds.  The other compounds are composed of only nonmetals.