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Chemistry group 33
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A pair of dice are rolled. What is the probability that the sum of the numbers on the upper faces is greater than 9 and even?
Suppose a student writes the days of the week on identical pieces of paper. She mixes them in in a bowl and selects one at a time. What is the probability that the day she selects will have the letter r in it?
In a class of boys and girls, the mean weight of 8 boys is 55 kg and the mean weight of a group of girls is 48 kg. The mean weight of all the children is 50.8 kg. Then how many girls are there?
Two fair dice are rolled once. What is the probability that the difference of the two numbers shown is 1?
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Finally, Arsenal did it! 💪💪 This team has shown so much growth and character. It’s more than just a win; it’s a statement. Huge congratulations to all the fans who never stopped believing! 🏆
@chemistry_group34
We remained idle yesterday; we ________ played football _________ watched television.
When I met her at the party, she told me she ______ her salary for the previous month. I just couldn't believe her. (EUEE 2016)
You ______ speak to him like that. After all, he is your elder brother and deserves some respect. (EUEE 2016)
They are talking about ______ artist we saw as we were coming here. What he was doing tells that he was definitely mentally unstable. (EUEE 2016)
Your wife ______ since 9:00 am but you don't even call and apologize for not being able to arrive until now. What excuse do you have for this? (EUEE 2016)
Qormaatni Naannoo Kutaa 6ffaafi 8ffaa Qabiyyeen Barnootaa Keessaa Qophaa'e Beekameera.
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BBO- Caamsaa 13/2018 Qormaatni Naannoo Kutaa 6ffaa qabiyyee barnootaa gosoota barnootaa kutaa 6ffaa keessaa qofa kan qophaa'e yoo ta'u, kan kutaa 8ffaa immoo qabiyyee barnootaa gosoota barnootaa kutaa 7ffaafi 8ffaa keessaa kan qophaa'e ta'uun beekameera.
Walumaagalatti, qormaatni kutaa 6ffaa Waxabajjii 8-9/2018 yoo, kutaa 8ffaa immoo Waxabajjii 11-12/2018 ta'uu hubachuun;
-Barattootni guyyoota muraasa hafan kanarratti hundaa'uun qo'annaa keessaniif xiyyeeffannoo akka kennitan,
- Barsiisotnis deeggarsa barattootaaf taasisaa turtaniif galata qabdu jechaa, deeggarsi keessan hanga xumuraatti daran cimee akka itti fufu yaboo jenneerra.
- Maatiin barattootaas ijoollee keessan haala mijeessuufi jajjabeessun cinaa akka dhaabbattan dhaamsa keenya ta'a.
📚CHEMISTRY EUEE QUESTIONS
1. The first atomic theory was proposed by:
(A) Niels Bohr
(B) Ernest Rutherford
(C) John Dalton
(D) J.J. Thomson
2. Dalton's atomic theory stated that all atoms of a given element are:
(A) Different in size
(B) Different in mass
(C) Identical in mass and properties
(D) Composed of smaller particles
3. Who discovered the electron?
(A) Ernest Rutherford
(B) James Chadwick
(C) J.J. Thomson
(D) Max Planck
4. Thomson's atomic model is known as the:
(A) Nuclear model
(B) Planetary model
(C) Plum pudding model
(D) Quantum mechanical model
5. Rutherford's gold foil experiment led to the discovery of the:
(A) Electron
(B) Neutron
(C) Nucleus
(D) Proton
6. Rutherford's atomic model proposed that the atom is mostly:
(A) Solid
(B) Liquid
(C) Empty space
(D) Filled with electrons
7. Which particle is NOT found in the nucleus of an atom?
(A) Proton
(B) Neutron
(C) Electron
(D) Nucleon
8. The atomic number of an element represents the number of:
(A) Neutrons in the nucleus
(B) Protons in the nucleus
(C) Electrons in the outermost shell
(D) Total number of particles in the nucleus
9. Isotopes of an element have the same number of:
(A) Neutrons
(B) Protons
(C) Mass number
(D) Both protons and neutrons
10. Who proposed that electrons orbit the nucleus in specific energy levels or shells?
(A) Ernest Rutherford
(B) J.J. Thomson
(C) Niels Bohr
(D) Max Planck
11. Bohr's atomic model successfully explained the:
(A) Spectra of all elements
(B) Spectra of hydrogen
(C) Existence of isotopes
(D) Wave nature of electrons
12. In Bohr's model, electrons can move to a higher energy level by:
(A) Emitting energy
(B) Absorbing energy
(C) Colliding with other electrons
(D) Moving closer to the nucleus
13. The quantum mechanical model of the atom treats electrons as:
(A) Particles only
(B) Waves only
(C) Both particles and waves
(D) Neither particles nor waves
14. Which principle states that it is impossible to know both the exact position and momentum of an electron simultaneously?
(A) Pauli Exclusion Principle
(B) Hund's Rule
(C) Heisenberg Uncertainty Principle
(D) Aufbau Principle
15. Atomic orbitals are regions of space where there is a high probability of finding:
(A) Protons
(B) Neutrons
(C) Electrons
(D) The nucleus
16. Which quantum number describes the shape of an atomic orbital?
(A) Principal quantum number (n)
(B) Azimuthal quantum number (l)
(C) Magnetic quantum number (ml)
(D) Spin quantum number (ms)
17. The maximum number of electrons that can occupy a p subshell is:
(A) 2
(B) 4
(C) 6
(D) 10
18. Which rule states that electrons will individually occupy each orbital within a subshell before doubling up in any one orbital?
(A) Pauli Exclusion Principle
(B) Hund's Rule
(C) Heisenberg Uncertainty Principle
(D) Aufbau Principle
19. According to the Aufbau principle, electrons fill orbitals in order of:
(A) Increasing energy
(B) Decreasing energy
(C) Increasing atomic number
(D) Decreasing atomic number
20. What does the Pauli Exclusion Principle state?
(A) Electrons must fill the lowest energy levels first
(B) No two electrons in the same atom can have the same set of four quantum numbers
(C) Electrons must occupy each orbital within a subshell individually before pairing up
(D) It is impossible to know both the exact position and momentum of an electron simultaneously
Answers:
1. C
2. C
3. C
4. C
5. C
6. C
7. C
8. B
9. B
10. C
11. B
12. B
13. C
14. C
15. C
16. B
17. C
18. B
19. A
20. B
@chemistry_group34
Which one of the following matter has strong intermolecular force?
