ورقة عمل الكيمياء لامتحانات القبول في التمريض مع الإجابات

Which electrons take part in chemical bonding?

1. AOnly the electrons in the first shell
2. BThe electrons closest to the nucleus
3. CAll electrons take part equally
4. DThe valence (outermost) electrons

Which quantity is the same for 1 mole of any substance?

1. AThe number of atoms per molecule
2. BThe mass in grams
3. CThe number of particles
4. DThe volume as a liquid

What is the name of the polyatomic ion NH₄⁺?

1. ANitride
2. BNitrate
3. CAmmonium
4. DAmmonia

ما نوع الرابطة في جزيء غاز الأكسجين O₂؟

1. Aرابطة أيونية
2. Bرابطة تساهمية أحادية قطبية
3. Cرابطة تساهمية ثنائية غير قطبية
4. Dرابطة فلزية

What is the oxidation number of sulfur in H₂SO₄?

1. A−2
2. B+2
3. C+6
4. D+4

Which nuclear process powers the Sun?

1. ACombustion of hydrogen gas with oxygen in its core
2. BFission of uranium into smaller nuclei
3. CFusion of hydrogen nuclei to form helium
4. DAlpha decay of helium

أي رابطة هي الأكثر قطبية؟

1. AH–F
2. BCl–Cl
3. CC–H
4. DH–H

In Rutherford's gold foil experiment, most alpha particles passed straight through the foil but a few bounced back. What did this show?

1. AElectrons are spread evenly through a positive "pudding"
2. BAn atom is mostly empty space with a small, dense, positive nucleus
3. CAtoms are solid, indivisible spheres
4. DElectrons move in fixed circular orbits