1
HESI Chemistry Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the lightest alkali metal?✔✔Lithium
What is the chemical symbol for phosphorus?
✔✔P
What is the oxidation state of chlorine in NaCl?
✔✔-1
What element is used in matchstick heads for ignition?✔✔Phosphorus
What gas smells like rotten eggs?✔✔Hydrogen sulfide 1 / 2
2
What element is found in both water and most acids?✔✔Hydrogen
What is the only liquid metal at room temperature?✔✔Mercury
What gas makes up about 78% of Earth’s atmosphere?✔✔Nitrogen
What is the heaviest naturally occurring halogen?✔✔Iodine
What is the formula of hydrochloric acid?✔✔HCl
What alkali metal reacts most violently with water?✔✔Francium
- / 2