Atomic Structure
Classifying Matter
Reactions
General Chemistry
This, that and the other
100
Quantity of these makes the element what it is.
What is the proton?
100
Water and sugar
What is a solution?
100
A reaction that releases heat.
What is exothermic?
100
Properties that describe how a substance reacts with another substance.
What are chemical properties?
100
A substance with a pH less than 7 is this.
What is an acid?
200
These particles change from isotope to isotope.
What is the neutron?
200
Carbon tetrachloride. (CCl4)
What is a compound?
200
What is formed during a reaction (on the right side of the arrow)?
What are products?
200
Elements in the same group (column) of the periodic table have similar properties because they have the same this.
What is the number of electrons in the outer shell?
200
Ions such as Na+ and K+ are known as these.
What are electrolytes?
300
The quantity of these can change without changing the element, but an ion forms.
What are electrons?
300
Iron
What is an element?
300
This is a substance that is made of more than one element.
What is a compound?
300
When atoms share electrons, they form this kind of bond.
What is covalent?
300
These are substances the are made of carbon and hydrogen only, and they are usually good fuels.
What are hydrocarbons?
400
This subatomic particle has such a small mass compared to the other subatomic particles' masses that it is zero.
What is the electron?
400
Ice. Wood. Metal.
What is a solid?
400
An enzyme or other substance that speeds up the reaction is known as this.
What is a catalyst?
400
C6H12O6 (The numbers should be subscripts.) The number of hydrogen atoms in this compound.
What is 12?
400
These biomolecules are made of carbon, hydrogen, and oxygen, and they are used for long-term energy storage. Examples are fats, oils, and waxes.
What are lipids?
500
Protons plus neutrons equals this.
What is the mass number?
500
Water vapor. Oxygen that we breathe. Carbon monoxide.
What is a gas?
500
A catalyst is able to speed up reactions because it lowers this.
What is the activation energy?
500
Due to the Law of Conservation of Matter, the number of atoms of each element on each side of an equation should be this.
What is the same or balanced?
500
This reaction is one of this type: 2 C4H10 (l) + 13 O2 (g) --> 8 CO2 (g) + H2O (l)
What is a combustion reaction?
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