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Chemistry Honors Second Nine Weeks Test

Authored by Laura Korenek

Chemistry

10th Grade

NGSS covered

Used 2+ times

Chemistry Honors Second Nine Weeks Test
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58 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.

Protons
Neutrons
Electrons
Valence Electrons

Tags

NGSS.HS-PS1-1

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which group has the greatest number of valence electrons?

1
14
18
16

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?

74.92 amu
24.97 amu
75.01 amu
74.51 amu

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Calculate the average atomic mass of silver.

106.38649amu
111.91896amu
107.8677amu
121

Tags

NGSS.HS-PS1-7

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

Compute the average atomic mass for silicon:

27.977
28.09
28.976
The average mass cannot be determined from provided information.

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What was Dmitri Mendeleev's greatest contribution to the history of the periodic table?

He arranged all of the known elements by their atomic number
He realised that there was a pattern of reactivity which repeated every 8 elements
He predicted the existence (and properties) of new elements
He identified the "law of triads" which became the groups

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