护理入学考试化学练习卷（附答案）

What is the maximum number of electrons the first electron shell can hold?

1. A2
2. B1
3. C18
4. D8

Which property is typical of bases?

1. AThey taste sour
2. BThey feel slippery
3. CThey turn blue litmus red
4. DThey have a pH below 7

A blown-up balloon is put in a freezer. What happens to its volume?

1. AIt stays exactly the same
2. BIt increases
3. CThe balloon bursts
4. DIt decreases

下列哪项描述的是吸热过程？

1. A它吸收热量，所以周围环境感觉更冷
2. B它释放热量，所以周围环境感觉更暖
3. C它只在非常高的温度下发生
4. D它既不吸收也不释放任何能量

Water climbs up a narrow glass tube. Which property mainly causes this?

1. AWater's high boiling point
2. BEvaporation of water from the tube
3. CLow density of water
4. DAdhesion of water to the glass

Which is larger, a sodium atom (Na) or a sodium ion (Na⁺)?

1. AThe sodium ion
2. BIt depends on the temperature
3. CThe sodium atom
4. DThey are the same size

Why does atomic radius decrease from left to right across a period?

1. AThe atoms lose electrons across the period
2. BNeutrons push the electrons outward less strongly
3. CMore protons pull the electrons of the same outer shell closer
4. DEach element adds a new electron shell

Alpha radiation is stopped by skin, yet an alpha source is very dangerous if swallowed or inhaled. Why?

1. AInside the body, alpha particles deposit all their energy in nearby living cells
2. BAlpha particles are only produced at body temperature
3. CStomach acid makes the alpha source more radioactive
4. DAlpha particles turn into much more penetrating gamma rays once inside the body