1.简单
What is a cation?
- AA negatively charged ion
- BA positively charged ion
- CA neutral atom
- DA molecule with no charge
What is a cation?
A cleaning solution has a pH of 12. How is it described?
与原子中的其他粒子相比,哪种粒子的质量几乎可以忽略?
At STP (0 °C and 1 atm), what volume does 1 mole of an ideal gas occupy?
AgNO₃ + NaCl → AgCl + NaNO₃ 是哪种类型的反应?
Zn + 2HCl → ZnCl₂ + H₂ 是哪种类型的反应?
Which phase change absorbs energy from the surroundings (is endothermic)?
Which substance has the lowest boiling point?
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