Unit 2 Test Review: Conservation in Matter
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
+2
Standards-aligned
Natasha Garza
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40 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The periodic table is organized into three main categories. Which of the following correctly identifies these categories?
solids, liquids, and gases
metals, nonmetals, and metalloids
elements, compounds, and mixtures
natural, synthetic, and alloys
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What does the subscript '3' in the chemical formula Al₂O₃ indicate?
There are 3 aluminum atoms in the molecule.
There are 3 oxygen atoms in the molecule.
There are 3 molecules of aluminum oxide.
There are 3 atoms of both aluminum and oxygen in the molecule.
Tags
NGSS.MS-PS1-1
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which of the following best describes the formula CaCO₃?
1 calcium, 1 carbon, 3 oxygen
1 calcium, 3 carbon, 3 oxygen
3 calcium, 1 carbon, 1 oxygen
3 calcium, 3 carbon, 1 oxygen
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
In the chemical formula for magnesium hydroxide, Mg(OH)₂, what does the subscript '2' outside the parentheses indicate?
There are 2 magnesium atoms in the molecule.
There are 2 oxygen atoms and 2 hydrogen atoms in the molecule.
There are 2 molecules of magnesium hydroxide.
There are 2 magnesium atoms, 2 hydrogen atoms and 2 oxygen atoms in the molecule.
Tags
NGSS.MS-PS1-1
5.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
Which of the following statements correctly describe how to identify the number of atoms in a chemical formula? Select ALL that apply.
If there is no subscript number after an element symbol, it means there is only one atom of that element.
A coefficient before a chemical formula multiplies the number of each type of atom in the formula by that coefficient.
Parentheses in a chemical formula are used to group elements, and the subscript outside the parentheses multiplies the number of atoms of each element inside the parentheses.
The element with the highest subscript number is the most abundant in the compound.
The subscript number following an element symbol indicates the number of atoms of that element in the molecule.
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which property does NOT normally describe metals?
brittle
good conductors of electricity
malleable and ductile
shiny luster
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which group of elements is brittle, shiny, and described as semiconductors?
metals
nonmetals
metalloids
transition metals
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