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Chemical Building Blocks

Authored by Charles Martinez

Chemistry

10th Grade

NGSS covered

Chemical Building Blocks
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45 questions

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1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?

74.92 amu
24.97 amu
75.01 amu
74.51 amu

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calcium has three different isotopes. One has a mass of 35.00 amu; another has a mass of 41.00 amu; and another has a mass of 40.00 amu. Which isotope is the most abundant of the three?

40.00 amu
41.00 amu
35.00 amu
impossible to tell

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

What is the name of the atom pictured here?

Nitrogen
Nitrogen-15
Nitrogen-7
Nitrogen-8

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

the smallest particle of an element that retains all the properties of that element; is electrically neutral, spherically shaped, and composed of electrons, protons, and neutrons

electron
neutron
atom
proton

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

the weighted average mass of the isotopes of that element

mass number
atomic number
nuclear equation
atomic mass

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

the number of protons in an atom

mass number
atomic number
atomic mass unit (amu)
atomic mass

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

theory which states that matter is composed of extremely small particles called atoms; atoms are invisible and indestructible; atoms of a given element are identical in size, mass, and chemical properties; atoms of a specific element are different from those of another element; different atoms combine in simple whole-number ratios to form compounds; in a chemical reaction, atoms are separated, combined, or rearranged

radioactive decay
dalton's atomic theory
nuclear equation
radioactivity

Tags

NGSS.HS-PS1-7

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