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Hesi A2 Chemistry Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
Which process changes a solid directly to a gas?✔✔Sublimation
Which element has the atomic number 1?✔✔Hydrogen
What is the chemical symbol for silver?✔✔Ag
Which type of reaction produces a precipitate?✔✔Double displacement reaction
What is the chemical formula for ammonia?
✔✔NH₃
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Which type of reaction involves the loss of electrons?✔✔Oxidation
Which type of reaction involves the gain of electrons?✔✔Reduction
Which element is essential for forming bones and teeth?✔✔Calcium
What is the pH of a 0.01 M HCl solution?
✔✔2
Which element is commonly used in batteries?✔✔Lithium
Which element is found in all organic compounds?✔✔Carbon
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Which type of mixture has a uniform composition throughout?✔✔Homogeneous mixture
Which particle in an atom is negatively charged?✔✔Electron
What is the chemical symbol for sodium?✔✔Na
What is the atomic number of carbon?
✔✔6
Which element has the chemical symbol O?✔✔Oxygen
What type of bond involves the sharing of electrons between atoms?✔✔Covalent bond
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