Unit 2 Review: Atoms

Unit 2 Review: Atoms

Assessment

Flashcard

Science, Chemistry

9th - 12th 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 radioactivity?

Back

Radioactivity is the process by which unstable atomic nuclei lose energy by emitting radiation. It can be used for good, such as in medical treatments and energy production.

2.

FLASHCARD QUESTION

Front

What particles are found inside the nucleus of an atom?

Back

Protons and neutrons are found inside the nucleus of an atom.

3.

FLASHCARD QUESTION

Front

Which particles have a negative charge?

Back

Electrons have a negative charge.

4.

FLASHCARD QUESTION

Front

What does the atomic number of an element represent?

Back

The atomic number of an element is the same as the number of protons in its nucleus.

5.

FLASHCARD QUESTION

Front

Why is the atomic mass of carbon (12.0107) not a whole number?

Back

The atomic mass is an average that takes into account the different isotopes of carbon and their relative abundances.

6.

FLASHCARD QUESTION

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

7.

FLASHCARD QUESTION

Front

What are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

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