5.1 and 5.2 Flashcards Preview

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Flashcards in 5.1 and 5.2 Deck (8)
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1
Q

periodic

A

describes something that occurs or repeats at regular intervals.

2
Q

periodic law

A

the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements.

3
Q

period

A

horizontal row of elements on the periodic table.

4
Q

group

A

the vertical column of elements in the periodic table.

5
Q

alkali metal

A

elements in group one of the periodic table.

6
Q

alkaline-earth metal

A

are less reactive than alkali metals are.

7
Q

halogen

A

are very reactive nonmetals because their atoms need to gain only one electron to have a complete outer level.

8
Q

noble gas

A

are unreactive nonmetals and are in group 18 of the periodic table.