8.6B, 7.6B, 8.6E, 6.7B, 8.7A Mini Quiz

What information does the periodic table provide to help identify reactants and products in a chemical reaction?

• It predicts the reaction speed

• It shows the elements involved in the reaction

• It determines the state of matter of the products

• It tells if a reaction is balanced

Tags

NGSS.MS-PS1-1

In the reaction 2Na + Cl₂ → 2NaCl, how many sodium (Na) atoms are present in the reactants?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How does the periodic table help determine whether an element will participate in a reaction?

• It shows the atomic mass

• It organizes elements by their reactivity

• It labels each element with a state of matter

• It predicts the speed of the reaction

A scientist observes a reaction involving Fe₂O₃ + 2Al → Al₂O₃ + 2Fe. Which element is replaced in this reaction, and why?

• Iron is replaced by aluminum because aluminum is more reactive

• Aluminum is replaced by oxygen because oxygen has more mass

• Oxygen is replaced by iron because iron is more reactive

• The equation is incorrect; no elements are replaced

The formula H₂SO₄ is given to a student. Using the periodic table, how many protons are in a molecule of sulfuric acid?

• 2

• 4

• 32

• 50

Tags

NGSS.MS-PS1-1

How many oxygen atoms are present in Ca(OH)₂?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Which formula correctly represents a compound containing two nitrogen atoms and three oxygen atoms?

• NO₃

• N₂O₃

• N₂O

• NO₂

Tags

NGSS.MS-PS1-1

A student is given Mg₃(PO₄)₂. How many phosphorus atoms are present?

• 1

• 2

• 3

• 6

Tags

NGSS.MS-PS1-1

A chemical formula for baking soda is NaHCO₃. What is the total number of atoms in this compound?

• 3

• 5

• 6

• 7

Tags

NGSS.MS-PS1-1

A scientist analyzes a molecule with the formula C₂H₆O. How many total atoms does it contain?

• 8

• 9

• 10

• 12

Tags

NGSS.MS-PS1-1