Chemistry Mid-Term Review

Inv. 1 part1

100

How many atoms are in the following molecule: C2H4

6

200

Rank the order of states of matter from least KE to most KE

Solid, liquid, gas

300

This state of matter has a definite volume, but no definite shape

Liquid

400

How many protons, neutrons and electrons does a neutral Beryllium atom have?

P: 4, N:5, E:4

500

What is an isotope? 

Atoms with a different atomic mass due to having different amounts of neutrons

Inv. 1 part 2

100

What is a valence electron?

Electrons on the outermost electron shell

200

How many valence electrons does phosphorus have? 

5

300

Draw the electron dot diagram of calcium 

Ca with 2 dots

400

What does an "s-orbital" look like?

A sphere

500

Neon has a full p orbital with 6 electrons. What would this orbital look like?

3-dumbell shaped orbitals put together 

Inv. 2

100

This type of element is malleable, ductile and is a good conductor of electricity 

Metal

200

Calcium is in group 2 period 3. What kind of ion with what kind of charge would calcium form?

cation with a 2+ charge

300

Which atom has the largest atomic radius out of aluminum, silicon or magnesium?

Magnesium 

400

If calcium loses two electrons, it's electron configuration would be similar to which group?

Noble Gases

500

Valence electrons do not experience the full attractive force of the nucleus, what causes this phenomenon?

The Shielding effect

Inv. 3

100

An atom has 1 valence electron in it's outer shell, what type of ion will the atom form?

X¹⁺

200

The stronger the intermolecular force the ___________ the melting point

higher

300

How do you determine if a substance is polar or nonpolar?

Subtract the electronegativities. If the difference is under 0.4 it is nonpolar, if it is 0.4-1.8 it is considered polar. 

400

Determine the name of the following compound: P₃O₅

Triphosphorous pentoxide

500

What is the chemical formula of Aluminum Oxide?

Al₂O₃

Inv. 4

100

If I am dissolving sugar into water, how could I increase the dissolution rate? 

Increase the temperature 

200

Temperature is a measure of..

average kinetic energy of the molecules

300

What is it called on a phase change diagram where all three points can exist in equlibrium?

Triple point

400

Does kinetic energy change when substances are increasing temperature, when substances are changing phases or both?

When substances are increasing temperature 

500

Which compound is most likely going to be a gas at room temperature? A metal compound, an ionic compound or a covalent compound? 

Covalent compound