CHEM 104 MODULE 1 TO MODULE 6 PRACTICE
EXAM BUNDLED EXAMS 2026 WITH SOLVED
QUESTIONS AND VERIFIED ANSWERS 100%
CORRECT FULL SOLUTION
◉Representative Elements . Answer: Elements where s and p orbitals
are filling and have metallic characteristics
◉Metals . Answer: - Solid at room temperature, lustrous, malleable,
conductive of heat and electricity
- Tend to form cations and ionic compounds
◉Metalloids . Answer: - Has properties of both metals and nonmetals
- Semi-conductive
◉Nonmetals . Answer: - Brittle, dull, poor conductors, or nonconductive
- Tend to form anions and covalent molecules
- More diverse than metals
- Exists as solids, liquids and gases
- MP are relatively lower than metals
,- Higher electronegativity than metals
- Most form anions
◉Group 1 Alkali Metals . Answer: - Soft metals with a silvery
appearance
- Largest atomic radii
- Lowest ionization energy
- 1 valence electron (s orbital) ns^1
- Form stable +1 cations
- Tend to form binary, ionic compounds
- Highly reactive and volatile with water
- Form basic solutions in water
- Produce hydrogen gas in acids
◉Common Uses of Alkali Metals . Answer: - Sodium is used to produce
titanium and make fog penetrating streetlights
- Sodium and lithium produce dyes and drugs
- Lithium is used in batteries
- Hydrogen is highly reactive, flammable/combustive and can be used in
an H bomb caused by fusing H isotopes under high temperatures
◉Group 2 Alkaline Earth Metals . Answer: - 2 valence electrons (s
orbital)
, - Form 2+ cations
- Less reactive than group 1 elements
- Tends to form ionic compounds
- Form basic solutions in water
- Produce hydrogen gas in acids
- Heavier elements are strong reducing agents
◉Common Use of Group 2 Alkaline Earth Metals . Answer: -
Magnesium produces bright, white light
- Mg is used in fireworks
- Mg fires cannot be put out with a fire extinguisher
- Mg alloys of Al are used to construct airplanes and missiles
- Mg is an ingredient of some anti-acids
- Calcium is found in marble, chalk and limestone
- Ca is added to paints and toothpaste
- Ca is released by cells to contract muscles
◉Group 12 . Answer: - Valence electrons located in s orbital
- Tend to form 2+ cations
- Mercury can form 1+ cation
- Similar behaviour to group 2 elements
- Reactivity trend is opposite groups 1 and 2
EXAM BUNDLED EXAMS 2026 WITH SOLVED
QUESTIONS AND VERIFIED ANSWERS 100%
CORRECT FULL SOLUTION
◉Representative Elements . Answer: Elements where s and p orbitals
are filling and have metallic characteristics
◉Metals . Answer: - Solid at room temperature, lustrous, malleable,
conductive of heat and electricity
- Tend to form cations and ionic compounds
◉Metalloids . Answer: - Has properties of both metals and nonmetals
- Semi-conductive
◉Nonmetals . Answer: - Brittle, dull, poor conductors, or nonconductive
- Tend to form anions and covalent molecules
- More diverse than metals
- Exists as solids, liquids and gases
- MP are relatively lower than metals
,- Higher electronegativity than metals
- Most form anions
◉Group 1 Alkali Metals . Answer: - Soft metals with a silvery
appearance
- Largest atomic radii
- Lowest ionization energy
- 1 valence electron (s orbital) ns^1
- Form stable +1 cations
- Tend to form binary, ionic compounds
- Highly reactive and volatile with water
- Form basic solutions in water
- Produce hydrogen gas in acids
◉Common Uses of Alkali Metals . Answer: - Sodium is used to produce
titanium and make fog penetrating streetlights
- Sodium and lithium produce dyes and drugs
- Lithium is used in batteries
- Hydrogen is highly reactive, flammable/combustive and can be used in
an H bomb caused by fusing H isotopes under high temperatures
◉Group 2 Alkaline Earth Metals . Answer: - 2 valence electrons (s
orbital)
, - Form 2+ cations
- Less reactive than group 1 elements
- Tends to form ionic compounds
- Form basic solutions in water
- Produce hydrogen gas in acids
- Heavier elements are strong reducing agents
◉Common Use of Group 2 Alkaline Earth Metals . Answer: -
Magnesium produces bright, white light
- Mg is used in fireworks
- Mg fires cannot be put out with a fire extinguisher
- Mg alloys of Al are used to construct airplanes and missiles
- Mg is an ingredient of some anti-acids
- Calcium is found in marble, chalk and limestone
- Ca is added to paints and toothpaste
- Ca is released by cells to contract muscles
◉Group 12 . Answer: - Valence electrons located in s orbital
- Tend to form 2+ cations
- Mercury can form 1+ cation
- Similar behaviour to group 2 elements
- Reactivity trend is opposite groups 1 and 2
