
Staar review

Quiz
•
Science
•
8th Grade
•
Hard
Luis Martinez
FREE Resource
29 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which elements are represented in the formula for sodium sulfate (Na2SO4) and how many atoms of each element are represented in the formula?
Sodium (Na) - 2, Sulfur (S) - 1, Oxygen (O) - 4
Sodium (Na) - 1, Sulfur (S) - 2, Oxygen (O) - 4
Sodium (Na) - 2, Silicon (Si) - 1, Oxygen (O) - 4
Sodium (Na) - 1, Sulfur (S) - 1, Oxygen (O) - 2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these statements about the mass of subatomic particles is true?
The mass of a proton is the same as the mass of an electron.
The mass of a neutron is the same as the mass of an electron.
The mass of a neutron is much greater than the mass of a proton.
The mass of a proton is much greater than the mass of an electron.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement is true of the two elements' reactivity?
Both are chemically reactive.
Both are chemically nonreactive.
Element X is more chemically reactive than Element Y.
Element Y is more chemically reactive than Element X.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement serves as evidence to support the answer to Part A?
Both models show two shells surrounding the nucleus.
Both models show ten neutrons in the nucleus.
Element X has seven electrons in its outer shell.
Element Y has an even number of protons and neutrons.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
All the elements in Group 2 of the periodic table are classified as _______.
nonmetals
metals
metalloids
protons
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Each element in Group 2 has fewer _______ than any of the elements in Group 17.
nonmetals
valence electrons
neutrons
protons
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mass of sulfuric acid (H₂SO₄) used in the reaction with calcium hydroxide (Ca(OH)₂) to produce calcium sulfate (CaSO₄) and water (H₂O)?
62 g
98 g
36 g
100 g
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