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7th Grade Unit 11: Chemical Reactions and Compounds Lesson 2: Periodic Table of Elements

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7th Grade Unit 11: Chemical Reactions and Compounds Lesson 2: Periodic Table of Elements Vocabulary of Instruction:. 1. Atomic number. Number of protons in an atom’s nucleus. Back to Main Page. 2. Families.

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7th Grade

Unit 11:Chemical Reactions and Compounds

Lesson 2:Periodic Table of Elements

Vocabulary of Instruction:

1 atomic number
1. Atomic number
  • Number of protons in an atom’s nucleus.
2 families

Back to Main Page

2. Families
  • Is a vertical column in the periodic table of the chemical elements. The Periodic Table has 18 Families.
3 groups
3. Groups
  • A group is a vertical column (top to bottom) in the periodic table. It is a synonymous of Families. There are 18 groups.

Groups

4 periods
4. Periods
  • Is a horizontal row (left to right) in the periodic table. There are 7 periods in the Periodic Table.

Periods

5 reactivity
5. Reactivity
  • Ready susceptibility to chemical change.
6 series
6. Series
  • Electrical current has one and only one path it can travel. In the Periodic Table is a name given different groups of elements at the bottom of it.
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