Chemistry Baseline

Which group of the periodic table are alkali metals found in?

• Group 1

• Group 2

• Group 7

• Group 8

Which of the followings is the most reactive alkali metal in water?

• Lithium

• Sodium

• Potassium

• Hydrogen

What is the symbol equation for the reaction between Potassium and water?

• 2K + 2H₂O → 2KOH + H₂

• 2K + 2H₂O → 2KO + 2H₂

• 2K + H₂O → 2KOH + CO₂

• 2Na + 2H₂O → 2NaOH + CO₂

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the followings is not an alkali metal?

• Li

• Ba

• K

• Cs

Tags

NGSS.HS-PS1-1

What happens to the atomic radius of the alkali metals as you move down the group?

• increases

• decreases

• no change

• first increases than decreases

What happens to the melting point of the alkali metals as you move down the group?

• decreases

• increases

• no change

• first increases than decreases

Which alkali metal is the least reactive?

• Lithium

• Sodium

• Potassium

• Rubidium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Alkali metals are so reactive with air that they are generally stored in ......

• salt

• oil

• vaults

• cotton

.................. is released when alkali metals react with water.

• Hydrogen

• Oxygen

• Metahne

• Carbon dioxide

What kind of solution is produced when group 1 metals react with water?

• Neutral

• Acidic

• Alkaline

• Ionized

Tags

NGSS.HS-PS1-2