护理入学考试化学练习卷（附答案）

什么是离子？

1. A带有电荷的原子或原子团
2. B由两个相同原子构成的分子
3. C与其他原子相比，原子核中多了中子的原子
4. D没有任何电子的粒子

Plants absorb energy from sunlight during photosynthesis. How is photosynthesis classified?

1. AEndothermic
2. BNuclear
3. CNeutralisation
4. DExothermic

Which property is typical of nonmetals?

1. AThey are shiny and easily bent into wires
2. BThey are all solids at room temperature
3. CThey easily lose electrons to form positive ions
4. DThey are poor conductors of heat and electricity

将 2 摩尔葡萄糖溶于水，配成 4 升溶液。摩尔浓度是多少？

1. A2 M
2. B4 M
3. C8 M
4. D0.5 M

Radioactive iodine (iodine-131) is used to treat some thyroid conditions. Why does it reach the thyroid?

1. AIodine-131 is not radioactive inside the body
2. BRadiation is always drawn toward the head
3. CThe thyroid gland takes up iodine to make its hormones
4. DIodine is strongly attracted to the metal ions stored in the neck

哪种改变会使一块粉笔与酸反应得更快？

1. A把粉笔研磨成粉末
2. B把酸放进冰箱冷却
3. C使用一大块粉笔
4. D用更多水稀释酸

Why are the radioactive tracers used for medical imaging usually chosen to have short half-lives?

1. AThey emit only alpha particles, which are harmless inside the body
2. BThey give a strong signal for imaging but leave the body's tissues exposed only briefly
3. CShort half-life isotopes are not radioactive
4. DThey stay active for many years, so a single dose can be used for every future scan

一个离子有 12 个质子和 10 个电子。它是什么？

1. AMg²⁻
2. BNa⁺
3. CMg²⁺
4. DNe