Isotope

Isotope

10th - 12th Grade

20 Qs

quiz-placeholder

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Isotope

Isotope

Assessment

Quiz

Chemistry

10th - 12th Grade

Hard

NGSS
HS-PS1-8

Standards-aligned

Created by

Charles Martinez

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Isotopes are atoms of the same element that have different

principal chemical properties.

masses.

numbers of protons.

number of electrons.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

As the mass number of an element's isotopes of an element increases, the number of protons

decreases.

increases.

remains the same.

doubles each time the mass number increases.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The average atomic mass of an element is the average of the atomic masses of its

naturally occurring isotopes.

two most abundant isotopes.

radioactive isotopes.

artificial isotopes.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The average atomic mass of an element

is the mass of its most abundant isotopes.

may not equal the mass of any of its isotopes.

cannot be calculated.

always adds up to 100.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The atomic mass of an element listed in the periodic table is the

average atomic mass.

relative atomic mass of the most abundant isotope.

relative atomic mass of the most abundant radioactive isotope.

mass number of the least abundant isotope.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Carbon-14 (atomic number 6), the radioactive nuclide used in dating fossils, has

6 neutrons.

8 neutrons.

10 neutrons.

14 neutrons.

Tags

NGSS.HS-PS1-8

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the number 84 in krypton-84 represent?

the atomic number

the mass number

the sum of the protons and electrons

twice the number of protons

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