PS.8.1.2, PS.8.1.3, PS.8.1.5 Review

Which of these chemical equations is balanced?

• Mg + HCl → H₂ + MgCl₂
• KClO₃ → KCl + O₂
• H₂O + CO₂ → H₂CO₃
• H₂ + O₂ → H₂O

Tags

NGSS.MS-PS1-5

How many oxygen atoms are in this chemical formula? 2Fe₂O₃

• 6 oxygen atoms
• 3 oxygen atoms
• 2 oxygen atoms
• 4 oxygen atoms

Tags

NGSS.MS-PS1-1

In a reaction A + B → C, reactant A has 5g and product C has 9g. How many grams does reactant B should have?

• 4g
• 9g
• 5g
• 14g

Tags

NGSS.MS-PS1-5

What are the products of the chemical reaction pictured?

• CH₄ and CO₂

• CH₄ and O₂

• CO₂ and H₂O

• O₂ and H₂O

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Balance this equation:

H₂ + Cl₂ ---> HCl

• It is balanced.

• H₂ + Cl₂ ---> 2HCl

• 3H₂ + Cl₂ ---> 6HCl

• H₂ + 3Cl₂ ---> 6HCl

Tags

NGSS.MS-PS1-5

How many protons are in a nitrogen atom?

• 5

• 7

• 14

• 28

Tags

NGSS.MS-PS1-1

Choose ALL of the alkali metals (group 1) from the list below:

• lithium

• copper

• mercury

• potassium

• sodium

What element will have the most similar physical and chemical properties to the element Lithium (Li)?

• Sodium (Na)
• Magnesium (Mg)
• Beryllium (Be)
• Calcium (Ca)

Elements in a ..................have similar chemical properties.

• period

• group

• row

I am a metal

I am in group 2

I am in period 6

I am…

• Mo

• Re

• S

• Ba