Interactions of Matter Review

Elements

100

Are Elements considered a pure substance or a mixture?

Pure substance

200

Elements are different from compounds because

Elements are composed of only one type of matter.

300

Are the properties of an element that make up a compound the same or different than the compound itself?

They are quite different.

400

Atoms are the smallest form of matter. Atoms are made up of 3 subatomic particles. Two of these subatomic particles make up the weight of the atom. What are these two subatomic particles, what are their charges, and where are they located in the atom?

Protons and neutrons. Protons are positive and neutrons are neutral/no charge They are both located in the nucleus.

500

I am an extremely small spinner that is attracted to positive(+). I hate other small spinners that is why I constantly spin around. I help Elements form ions and chemical bonds to occur. Who am I?

An electron

Compounds

100

Compounds are formed by

Chemical means only Chemical bonding

200

This tells us what kind of atoms are present in a compound, and how many. This is

The chemical formula

300

How many atoms of Carbon are in C₁₂H₂₂O₁₁?

12 Carbon atoms

400

Which chemical compound is present in a fire extinguisher that puts out fires?

CO₂ Carbon Dioxide

500

Compounds form through 2 types of bonds. One type is an attractions between opposites (positive and negative) and the other type is when two atoms share electrons. Name the types of bonds

Ionic bonds & Covalent bonds

Mixtures

100

Homogeneous & Heterogeneous are two types of

Mixtures

200

There are different ways that you can separate mixtures. How would I separate a mixture of salt water?

Use heat Boil the mixture and the water will evaporate.

300

Mixtures are made up of more that one kind of molecule like NaCl & H₂O. These Mixtures are separated by __________ only.

Physical means

400

A Pizza is a type of mixture that is not uniform throughout. What type of mixture is pizza?

Heterogeneous

500

The world is surrounded by water. Ocean water is a mixture composed of 3.5% of salt. What type of mixture is Ocean water considered to be? Why?

Homogeneous - A salt water mixture is uniform throughout

Periodic Table & Atoms

100

Elements on the periodic table are arranged by

Increasing Atomic Number

200

Elements are placed in columns and rows. The rows are considered _____________ and the columns are considered _____________.

Periods, Groups

300

Group 3 - Group 12 on the periodic table are called

Transition metals

400

Group 18 usually has a full outer shell, which means it has how many valence electrons? What is the name of this group?

8 valence electrons Noble Gases

500

Which group on the periodic table, readily reacts with Group 1 (Alkali Metals)? (group number & name)

Group 17 - Halogens

Law of Conservation of Mass

100

Define the Law of Conservation of Mass.

Mass/Matter can neither be created nor destroyed.

200

During a chemical reaction where the state of a matter changes from a liquid to a solid, or freezes, energy is released. This type of reaction is called

Exothermic

300

During a chemical reaction where the state of matter changes from a solid to a liquid, or melts, the energy is _________ and this is called __________

absorbed, Endothermic

400

Does this reaction below follow the Law of Conservation of Mass? Why or Why Not? You must explain. H₂ + N₂ ---> NH₃

No because there are 2 H atoms in the reactants and 3 H atoms in the products. There is also 2 N atoms in the reactants and 1 in the products.

500

Balance this equation __SnO₂ + __H₂ --> __Sn + __H₂O

SnO₂ + 2H₂ --> Sn + 2H₂O