1.쉬움
What does the octet rule state?
- AEvery stable molecule contains exactly 8 atoms
- BEvery stable atom has exactly 8 protons in its nucleus
- CAtoms tend to gain, lose or share electrons to get 8 outer electrons
- DAn atom can form a maximum of 8 covalent bonds
2.쉬움
물을 흔히 "만능 용매"라고 부르는 이유는 무엇인가요?
- A지구에서 발견되는 유일한 액체이기 때문이다
- B다른 흔한 액체보다 더 많은 물질을 녹이기 때문이다
- C분자 어디에도 부분 전하가 없어 모든 것과 섞이기 때문이다
- D모든 물질을 완전히 녹이기 때문이다
3.쉬움
What is a horizontal row of the periodic table called?
- AA block
- BA family
- CA period
- DA group
4.보통
What is the molar mass of sodium chloride, NaCl (Na = 23, Cl = 35.5 g/mol)?
- A58.5 g/mol
- B81.5 g/mol
- C12.5 g/mol
- D23 g/mol
5.보통
How does dissolving salt in water affect the water's boiling point?
- AIt raises the boiling point slightly
- BIt lowers the boiling point slightly
- CIt has no effect on the boiling point
- DIt makes the water boil at room temperature
6.보통
What are London dispersion forces?
- AAttractions between a hydrogen atom and a metal ion
- BWeak, temporary attractions caused by shifting electrons in molecules
- CStrong bonds formed by transferring electrons
- DForces that hold protons together in the nucleus
7.어려움
원자 수가 가장 많은 시료는 어느 것인가요?
- ACH₄ 1 mol
- BHe 1 mol
- CH₂O 1 mol
- DO₂ 1 mol
8.어려움
Element A has 1 valence electron and element B has 7 valence electrons, both in period 3. Which statement best compares them?
- ABoth are metalloids
- BBoth are unreactive because they are in the same period
- CA is a reactive metal and B is a reactive nonmetal
- DA is a nonmetal and B is a metal
정답표
- 1. C · Atoms tend to gain, lose or share electrons to get 8 outer electrons
- 2. B · 다른 흔한 액체보다 더 많은 물질을 녹이기 때문이다
- 3. C · A period
- 4. A · 58.5 g/mol
- 5. A · It raises the boiling point slightly
- 6. B · Weak, temporary attractions caused by shifting electrons in molecules
- 7. A · CH₄ 1 mol
- 8. C · A is a reactive metal and B is a reactive nonmetal
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