1.やさしい
What is the SI base unit of mass?
- AKilogram
- BGram
- CNewton
- DPound
2.やさしい
Which type of radiation is the most penetrating?
- ABeta particles
- BGamma rays
- CAlpha particles
- DThey are all equally penetrating
3.やさしい
Where are the transition metals located on the periodic table?
- AAbove the noble gases
- BIn group 1 on the far left
- CIn group 18 on the far right
- DIn the central block, groups 3 to 12
4.ふつう
反応 2Mg + O₂ → 2MgO で、酸化される物質はどれか。
- Aマグネシウム。電子を得るから
- B酸素。電子を失うから
- Cマグネシウム。電子を失うから
- Dどちらの物質も電荷が変わらない
5.ふつう
Why does keeping food in a refrigerator slow down spoilage?
- ALower temperatures raise the activation energy of every reaction
- BCold temperatures add preservatives to the food
- CLower temperatures slow down chemical and microbial reactions
- DCold air contains no oxygen
6.ふつう
What are London dispersion forces?
- AWeak, temporary attractions caused by shifting electrons in molecules
- BAttractions between a hydrogen atom and a metal ion
- CForces that hold protons together in the nucleus
- DStrong bonds formed by transferring electrons
7.むずかしい
Which list puts fluorine, chlorine and bromine in order of increasing electronegativity?
- ACl < Br < F
- BBr < Cl < F
- CF < Cl < Br
- DBr < F < Cl
8.むずかしい
Carbon-12 and carbon-14 react in exactly the same way in chemical reactions. Why?
- AThey have the same number of neutrons
- BCarbon-14 turns into carbon-12 before reacting
- CThey have the same number of protons and electrons
- DThey have the same mass number
解答
- 1. A · Kilogram
- 2. B · Gamma rays
- 3. D · In the central block, groups 3 to 12
- 4. C · マグネシウム。電子を失うから
- 5. C · Lower temperatures slow down chemical and microbial reactions
- 6. A · Weak, temporary attractions caused by shifting electrons in molecules
- 7. B · Br < Cl < F
- 8. C · They have the same number of protons and electrons
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