The Periodic Table

Question 1

Guiding Questions

Answer 1

Why do elements need to be organized?
How was the periodic table developed?
What information about elements is provided by the periodic table?

Question 2

Atomic Mass

Answer 2

The mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes

Question 3

Periodic Table

Answer 3

A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns

Question 4

Chemical Symbol

Answer 4

A notation of one or two letters representing a chemical element

Question 5

Period

Answer 5

The interval of time between successive occurrences of the same state in an oscillatory or cyclic phenomenon, such as a mechanical vibration, an alternating current, a variable star, or an electromagnetic wave

Question 6

Group

Answer 6

A column in the periodic table of the chemical elements

Question 7

Organizing things usually makes them easier to use because…

Answer 7

You can better know their properties or characteristics

Question 8

Items grouped together are likely to have

Answer 8

Some properties that are similar

Question 9

Scientists wondered

Answer 9

Whether the properties of elements followed a pattern