Chemistry Checkpoint

What are the positively charged particles in an atom called? 

• Protons
• Neutrons
• Electrons
• Nucleus 

True or false: everything is made of atoms

• True
• False

_{How many protons does Helium have?}

• 4
• 4.0026
• 2
• 1

Second shell can hold up to

• 2 electrons

• 8 electrons

• 18 electrons

• 32 electrons

Which chemical equation shows a displacement reaction?

• Carbon + oxygen → carbon dioxide

• Copper sulfate + magnesium → magnesium sulfate + copper

• Magnesium + oxygen → magnesium oxide

• Sodium hydroxide + hydrochloric acid → sodium chloride + water

Which chemical equation shows the formation of a metal oxide?

• Carbon + oxygen → carbon dioxide

• Copper sulfate + magnesium → magnesium sulfate + copper

• Magnesium + oxygen → magnesium oxide

• Sodium hydroxide + hydrochloric acid → sodium chloride + water

Given the following metals, which is the most reactive among these metal elements?

Zinc copper Sodium Iron

• zinc

• copper

• Sodium

• iron

Which of the following reaction is an example of endothermic reaction?

• Neutralization

• Rusting

• Decomposition of calcium carbonate

• Decomposition of hydrogen peroxide

_____ reactions usually feel hot!

• endothermic

• exothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What instrument would you use to detect an endothermic or exothermic reaction?

• triple beam balance

• ruler

• thermometer

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-6

NGSS.MS-PS3-4