
Chemistry 2nd Nine Weeks Practice Test
Authored by Laura Korenek
Chemistry
11th Grade
NGSS covered
Used 4+ times

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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Elements in the same column of the periodic table always have the same # of _______ as one another.
Tags
NGSS.HS-PS1-1
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which group has the greatest number of valence electrons?
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which elements have the most similar chemical properties?
boron and carbon
oxygen and sulfur
aluminum and bromine
argon and silicon
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 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?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the average atomic mass of silver.
Tags
NGSS.HS-PS1-7
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What was Dmitri Mendeleev's greatest contribution to the history of the periodic table?
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Why were there blank spaces left in Mendeleev's periodic table?
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