WorksheetsSTAAR Review 2019-2021-2022 8th Grade Science
Total questions: 23
Worksheet time: 19mins
Based on these properties, which element is most likely a nonmetal?
Element 1
Element 2
Element 3
Element 4
Which statements correctly compare metals and nonmetals?
F
G
H
J
A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material?
F
G
H
J
Which statements best describe the charges on the particles in this model?
If a fluorine atom has a mass number of 19, how many neutrons are in the atom?
How many neutrons are in the nucleus of a potassium atom with a mass number of 39?
Click on the visual for the question.
Sodium and Lithium have similar chemical properties. What characteristics of these elements explains why they are chemically similar?
Atoms of which two elements are represented by these two models?
Oxygen, O, and Neon, Ne
Fluorine, F, and Neon, Ne
Silicon, Si, and Phosphorous, P
Beryllium, Be, and Boron, B
Which pair of elements has reactivity that is similar to Chlorine, Cl ?
Fluorine, F
Sulfur, S
Iodine, I
Argon, Ar
Atoms of which two elements have a combined total of 23 protons?
Boron, B
Carbon, C
Sodium, Na
Magnesium, Mg
None of these
In this model, which particle determines the reactivity of the atom?
W
X
Y
Z
None of them
Which element has the same number of energy levels as Lithium?
Beryllium
Sodium
Magnesium
Potassium
Which element has chemical properties that are most similar to the chemical properties of Sulfur, S ?
Silicon, S
Chlorine, Cl
Selenium, Se
Phosphorus, P
Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?
Boron, B
Aluminum, Al
Fluorine, F
Cesium, Cs
Chlorine, Cl
One of the properties that makes Copper, Cu, useful for household wiring is its ability to conduct electricity. Which other element is most likely to conduct electricity? (a)
Based on this information, the element could NOT be a member of which group on the periodic table?
Group 2
Group 8
Group 12
Group 18
Based on the data given, the unknown metal is most likely--- (a)
The students most likely have which type of rock? (a)
Which process describes only a physical change? (a)
Click on the image for the question.
F
G
H
J
Click on the image for the question.
F
G
H
J
Which substance listed in the chart is made up of the most atoms?
Carbonic acide
Nitric acid
Phosphoric acid
Sulfuric acid
