ACA Unit 1 Atomic Structure

ACA Unit 1 Atomic Structure

Assessment

Flashcard

Chemistry

9th - 12th Grade

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, calculated as the sum of protons and neutrons in the nucleus.

2.

FLASHCARD QUESTION

Front

How do you calculate average atomic mass from isotopic abundance?

Back

Average atomic mass = (fraction of isotope 1 * atomic mass of isotope 1) + (fraction of isotope 2 * atomic mass of isotope 2) + ...

3.

FLASHCARD QUESTION

Front

What did Rutherford's gold foil experiment reveal about atomic structure?

Back

Rutherford concluded that atoms are mostly empty space with a small, dense nucleus.

4.

FLASHCARD QUESTION

Front

What determines the chemical properties of an element?

Back

The number of protons in an atom determines the chemical properties of an element.

5.

FLASHCARD QUESTION

Front

What is true for a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

6.

FLASHCARD QUESTION

Front

Define protons.

Back

Protons are positively charged subatomic particles found in the nucleus of an atom.

7.

FLASHCARD QUESTION

Front

Define neutrons.

Back

Neutrons are neutral subatomic particles found in the nucleus of an atom.

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