Physical Properties & Trends
What happens to the atomic radius of Group 2 elements as you move down the group, and why?
It increases due to the addition of electron shells
What type of compound forms when a Group 2 element reacts with oxygen?
Metal Oxide
What is calcium carbonate used for in the construction industry?
Building material to make cement
Which element gives the red colour in fireworks?
Strontium
What is the trend in first ionization energy as you go down Group 2?
It decreases because of increased atomic radius and shielding.
Which Group 2 element reacts vigorously with water to produce hydrogen gas and a hydroxide?
Calcium
Calcium Carbonate is often used in medicine as an active ingredient in which over-the-counter product?
Antacid (used for treating heartburn)
Which Group 2 element is found in chlorophyll?
Magnesium
How does the melting point change down Group 2 and why?
It generally decreases due to weaker metallic bonding as the atomic size increase.
Write the balanced equation for the reaction of calcium with dilute hydrochloric acid?
Ca ( s ) calcium + 2 HCl ( aq ) hydrochloric acid → CaCl 2 ( s ) calcium chloride + H 2 ( g ) hydrogen .
Which Group 2 element is often used in the production of strong alloys for airplanes and car parts?
Magnesium
This Group 2 elements compound is also known as "quicklime"
Calcium in the form of calcium oxide
Which property measures the tendency of an atom to attract electrons, and how does this property change down Group 2?
Electronegativity and it decreases down the group.
Which Group 2 sulfate is the least soluble in water?
Barium Sulfate
What is the application of magnesium hydroxide used for in environmental science
To neutralize acidic wastewater.
Which Group 2 element is found in large quantities in human bones and teeth?
Calcium
Explain why magnesium has a higher ionization energy than calcium.
Because magnesium has a smaller atomic radius, so its outer electrons are held more tightly by the nucleus.
How does lattice energy influence the solubility of Group 2 carbonates?
Higher lattice energy makes a compound less soluble
Which Group 2 compound is utilized in the treatment of acid-rain affected lakes to neutralize acidity?
Calcium Carbonate
Which Group 2 element is also used in radiation shielding?
Barium