Category 1: Matter & Energy Assessment

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

How many different elements are involved in the reaction shown above? (6.5C)

Tags

NGSS.MS-PS1-1

Which of these best describes one of the subatomic particles that could be found at location X in the model of an atom shown above? (8.5A)

• It has mass but no charge.

• It has no mass and a positive charge

• It has a large mass and a negative charge.

• It has no mass and an equal number of positive and negative charges.

Tags

NGSS.MS-PS1-1

An element has a metallic-gray appearance. It also has the properties of both a metal and a nonmetal. In which section of the periodic table indicated would the element most likely be found? (8.5C)

• 1

• 2

• 3

• 5

A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction? (8.5E)

• Heat is added to the sugar crystals.

• The sugar melts and becomes a liquid.

• The temperature of the sugar increases.

• Gas is produced as the sugar turns black.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following could be the chemical formula for sulfuric acid? (8.5D)

• HSO

• HSO₄

• H₂SO₄

• HS₂O₄

Tags

NGSS.MS-PS1-1

All the following chemical equations are balanced except — (8.5F)

• C₃H₈ + O₂ → 3CO₂ + 4H₂O

• RbBr + AgCl → AgBr + RbCl

• WO₃ + 3H₂ → W + 3H₂O

• Zn + 2HCl → ZnCl₂ + H₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Zn + 2HCl ZnCl₂ + H₂

Based on the reaction shown above, which statement best supports the law of conservation of mass? (8.5F)

• There are more chlorine atoms in the reactant.

• There are more hydrogen atoms in the product.

• The number of chlorine atoms is unequal in the reactants and products.

• The number of reactant atoms is equal to the number of product atoms.

Tags

NGSS.MS-PS1-5

All of the following elements are metals except — (8.5C)

• lead

• iron

• gold

• silicon

An atom of an element contains 20 protons. What is the identity of the element? (8.5B)

• Argon

• Calcium

• Neon

• Potassium

Elements are arranged in the Periodic Table based on their properties in a particular order. Which of the following best identifies the period and group of the elements listed? (8.5C)

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