Trend in groups 1,7,8

Group 1 elements are also known as

• Noble gas

• Halogen

• Alkaline earth metals

• Alkali metals

Arrange the elements in group 1 from the top to bottom of the group.

• Li, Na, K, Fr, Rb, Cs

• Li, Na, K, Rb, Fr, Cs

• Li, Na, K, Rb, Cs, Fr

• Fr, Cs, Rb, K, Na, Li

What gas is given off when group 1 elements reacts with water?

• Hydrogen

• Oxygen

• Carbon dioxide

• Helium

How many electrons are in the outer shell of group 1 elements?

• 0

• 1

• 2

• 3

Which of the following is the most reactive in water?

• Lithium
• Sodium
• Potassium

What is the symbol equation for the reaction between sodium hydroxide and water?

• 2Na + 2H₂O → 2NaOH + H₂
• Na + H₂O → NaOH + H
• Na + H₂0 → NaCl + CO₂
• 2Na + 2H₂O → 2NaH₂ + O₂

Which of the following properties would most likely belong to an element in Group I?

• Low density, low melting point, react vigorously with water

• Low density, high melting point, mild reaction with water

• High density, low melting point, react vigorously with water

• High density, high melting point, mild reaction with water

Which of the following is true about Group VII elements?

• Chlorine is a greenish-yellow liquid.

• Bromine is a reddish brown liquid.

• Iodine forms covalent compound that is soluble in water.

• Astatine forms ionic compound that is soluble in organic solvent.

Astatine is below iodine in the Periodic Table. Which of the following best describes astatine at room temperature?

• black solid

• black liquid

• reddish-brown solid

• reddish-brown liquid

Select all the correct statements.

• Sodium exploded into purple flame in water.

• Potassium reacts explosively in water.

• Sodium reacts less vigorously in water.

• Reaction of potassium changes the water (with Universal Indicator) from green to blue.