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Intro to Chemistry
Matter Basics
Sturcture of the Atom
Intro to the Periodic Table
More Q's on the Periodic Table
100
An educated guess or explanation.
What is a hypothesis?
100
Anything that has mass and occupies space.
What is matter?
100
Elements are composed of tiny, discrete, indivisibly and indestructible particles.
What are atoms?
100
Elements that have similar properties.
What are families?
100
The periodic table is arranged in seven horizontal rows called________.
What are periods?
200
The study of the composition of matter and the changes it undergoes.
What is the study of chemistry?
200
Solid, liquid and gas.
What are the 3 physical states of matter?
200
Electrons, protons and neutrons.
What are subatomic particles?
200
These elements lie on the step stair line.
What are metalloids?
200
Metals, metalloids and nonmetals.
What are the three main classes of elements?
300
Observing and stating a problem or question.
What is the first stage of the scientific method?
300
Pb
What is the symbol for lead?
300
Electrons exist in these.
What are energy levels?
300
Elements that, while not combining with other elements, combine with other atoms or themselves.
What are polyatomic molecular elements?
300
The basis of __________ is the classification of elements by increasing atomic number.
What is the Periodic Law?
400
This branch of chemistry is mostly concerned with the study of compounds containing carbon.
What is organic chemistry?
400
This property can be seen only when a substance undergoes a change in composition.
What is a chemical property?
400
These electrons are in the highest principal energy level of the atom.
What are valence electrons?
400
To satisfy this, most elements in nature are combined with other elements to form compounds.
What is the Octet rule?
400
The _____ or the size of an atom increases going down a group and decreases going across from left to right.
What is atomic radius?
500
This branch of chemistry includes instrumental methods of measurement.
What is analytical chemistry?
500
A ________ is composed of gases, liquids or solids dissolved in liquids.
What is a solution?
500
They have the same chemical properties but slightly different physical properties.
What is an isotope?
500
Only __________ electrons are involved in bonding.
What are valence electrons?
500
All atoms are assigned an electronegativity value between 0 and 4.0 based on the ____.
What is the Pauling Electronegativity Scale ?