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Assessment

Quiz

Science

8th Grade

Hard

Created by

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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