ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

Which electrons take part in chemical bonding?

1. AThe electrons closest to the nucleus
2. BOnly the electrons in the first shell
3. CThe valence (outermost) electrons
4. DAll electrons take part equally

A cleaning solution has a pH of 12. How is it described?

1. AWeakly acidic
2. BStrongly acidic
3. CStrongly basic
4. DNeutral

โซเดียมและโพแทสเซียมอยู่ในหมู่ใด

1. Aโลหะแอลคาไล (หมู่ 1)
2. Bฮาโลเจน (หมู่ 17)
3. Cแก๊สมีตระกูล (หมู่ 18)
4. Dโลหะแอลคาไลน์เอิร์ท (หมู่ 2)

อะตอมของคลอรีน-37 มีโปรตอน 17 ตัว มีนิวตรอนกี่ตัว

1. A54
2. B20
3. C37
4. D17

A student tests how temperature affects the rate of a reaction. What is the independent variable?

1. AThe reaction rate
2. BThe type of beaker used
3. CThe temperature
4. DThe volume of acid, which is kept the same

What is carbon-14 dating used for?

1. AEstimating the age of material that was once alive
2. BMeasuring body temperature
3. CFinding the exact age of rocks that are billions of years old
4. DDetecting carbon monoxide in a room

How much water must be added to 50 mL of a 10% solution to make a 2% solution?

1. A40 mL
2. B200 mL
3. C250 mL
4. D100 mL

An unknown element is shiny, conducts electricity, and reacts vigorously with water to form a basic solution and hydrogen gas. In which group is it most likely?

1. AGroup 17 (halogens)
2. BGroup 1 (alkali metals)
3. CGroup 18 (noble gases)
4. DGroup 14 (carbon group)