Atomic Theory Unit

Atomic Theory Unit

Assessment

Flashcard

Chemistry

10th - 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 the mass number in an atomic symbol?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

2.

FLASHCARD QUESTION

Front

How do you calculate the average atomic mass of an element with multiple isotopes?

Back

Multiply the mass of each isotope by its relative abundance (as a decimal), then sum these values.

3.

FLASHCARD QUESTION

Front

What is the excited state electron configuration of sodium (Na)?

Back

2-7-2

4.

FLASHCARD QUESTION

Front

What is the maximum number of electrons that can occupy the second shell of an atom?

Back

8 electrons.

5.

FLASHCARD QUESTION

Front

Which isotope of lead is likely to be the most abundant if the average atomic mass is 207.2?

Back

Lead-207 is likely the most abundant isotope.

6.

FLASHCARD QUESTION

Front

What does the atomic number represent in an atomic symbol?

Back

The atomic number represents the number of protons in the nucleus of an atom.

7.

FLASHCARD QUESTION

Front

Define isotopes.

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

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