Show:
Introduction to Chemistry
Basic Concepts of Matter
The Structure of the Atom
Introduction to the Periodic Table
More Q's on the Periodic Table
100
An educated guess or possible explanation for a problem.
What is a hypothesis?
100
What is an element?
A pure substance that cannot be broken down.
100
Elections on the outer most shell.
What are valence electrons?
100
Seven horizontal rows.
What are periods?
100
Three main divisions of the periodic table.
What are metals, metalloids and non-metals?
200
What is the study of Kinetics, reaction mechanisms, bonding and structure of compounds and thermodynamics.
What is physical chemistry?
200
These changes are always reversible.
What is a physical change?
200
Protons plus neutrons give this.
What is the mass number?
200
Elements along the staircase.
What are metalloids?
200
Helium is apart of this family.
What are noble gases?
300
Accurate behavior of nature, with no exceptions.
What is a Law?
300
Two or more pure substances, substances can easily be identified.
What is a heterogeneous matter.
300
He proposed an atomic theory in the 1900 century.
Who is John Dalton?
300
These elements have a high ductility.
What are metals?
300
This increases going down a group and decreases going down a period.
What is atomic radius?
400
To give explanations for nature.
What is science?
400
What is Einsteinium?
This element has 99 protons.
400
Different atomic masses but the same atomic numbers.
What are isotopes?
400
Atoms of different elements can unite in different ratios to form more than one compound
What is Dalton's Atomic Theory
400
This element exists in nature as a gas, but forms positive ions, like metals
What is hydrogen?
500
Study of compounds that contain Carbon.
What is organic chemistry?
500
Argentum is the Latin for this element.
What is Silver?
500
Atoms that have a different mass number, but the same atomic number.
What are isotopes?
500
In 1869 this man presented a paper on the periodic table, predicting that new elements would be discovered.
Who is Dmitri Mendeleev?
500
How strongly an atom can attract electrons.
What is electronegativity?