Elements and the Periodic Table

Elements and the Periodic Table

Assessment

Flashcard

Science

8th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the atomic number of an element based on?

Back

The atomic number of an element is based on the number of protons in its nucleus.

2.

FLASHCARD QUESTION

Front

How did Mendeleev arrange the first periodic table?

Back

Mendeleev created the first periodic table by arranging elements in order of increasing atomic mass.

3.

FLASHCARD QUESTION

Front

Which elements do not ordinarily form compounds?

Back

The elements that do not ordinarily form compounds are noble gases.

4.

FLASHCARD QUESTION

Front

What are the horizontal rows in the periodic table called?

Back

The horizontal rows in the periodic table are known as periods.

5.

FLASHCARD QUESTION

Front

What is half-life in the context of radioactive isotopes?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

6.

FLASHCARD QUESTION

Front

What is the significance of half-life measurements?

Back

Measurements of half-life make radioactive isotopes useful for determining the ages of rocks and fossils.

7.

FLASHCARD QUESTION

Front

What are the main categories of elements in the periodic table?

Back

The main categories of elements in the periodic table are metals, nonmetals, and metalloids.

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