Elements
Compounds
Mixtures
Periodic Table & Atoms
Law of Conservation of Mass
100
Are Elements considered a pure substance or a mixture?
Pure substance
100
Compounds are formed by
Chemical means only Chemical bonding
100
Homogeneous & Heterogeneous are two types of
Mixtures
100
Elements on the periodic table are arranged by
Increasing Atomic Number
100
Define the Law of Conservation of Mass.
Mass/Matter can neither be created nor destroyed.
200
Elements are different from compounds because
Elements are composed of only one type of matter.
200
This tells us what kind of atoms are present in a compound, and how many. This is
The chemical formula
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.
200
Elements are placed in columns and rows. The rows are considered _____________ and the columns are considered _____________.
Periods, Groups
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
Are the properties of an element that make up a compound the same or different than the compound itself?
They are quite different.
300
How many atoms of Carbon are in C12H22O11?
12 Carbon atoms
300
Mixtures are made up of more that one kind of molecule like NaCl & H2O. These Mixtures are separated by __________ only.
Physical means
300
Group 3 - Group 12 on the periodic table are called
Transition metals
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
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.
400
Which chemical compound is present in a fire extinguisher that puts out fires?
CO2 Carbon Dioxide
400
A Pizza is a type of mixture that is not uniform throughout. What type of mixture is pizza?
Heterogeneous
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
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
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
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
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
500
Which group on the periodic table, readily reacts with Group 1 (Alkali Metals)? (group number & name)
Group 17 - Halogens
500
Balance this equation __SnO2 + __H2 --> __Sn + __H2O
SnO2 + 2H2 --> Sn + 2H2O
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