1. Which subatomic particle/s is/are present in the nucleus of an atom based on Rutherford's discovery
A Proton only
C neutron and electron
B. Proton and neutron
D. proton and electron
2. Which atomic model is proposed by Schrodinger?
A Quantum mechanical model
C Raisin brend model
B. Planetary model
D. Naclear model
3. The word atom comes from the Greek word "atomos" which means
A. Indivisible B. Very tiny
C. Molecule D. Matter
4. Which of the following best fits Thomson's model of the atom?
A Planetary B. Plum Pudding C Quantum Mechanical D. Electron Cloud
5. The quantum mechanical model describes electrons
A Waves
C. Small, hard spheres
B. Particles with wave-like motion
D. Particles
6. Which partide has a positive charge?
A Electron
B. Proton C. Neutron
D. Quark
7. Which atom contains exactly 15 protons?
A Carbon B. Nitrogen COxygen
D. Phosphorus
8. Sodium has a mass number of 23 and atomic number of 11. How many protons does Sodium have?
A 22
B. 12
C 11
D. 34
9. How many valence electrons does Nitrogen have?
A 5
B. 4
C3
D.2
10. The element Boron is directly above Aluminum on the periodic table. Which statement about Boron is
true?
A. Boron is in the same period as aluminum
B Boron is in the same group as Aluminum and has 5 valence electrons
C Boron has 5 valence electrons and is in the same period as aluminum
D. Boron is in the same group as aluminum and has 3 valence electrons
11. Which of the following elements below will most likely form an lonic Bond?
A. Cs and O
B. Li and Mg
C. Ne and C1
D. P and O
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Answer:
A
Explanation:
because it is the most important
1. A protons
2.A quantum mechanical model
3.D Matter
4.B (maybe)
5.A Waves
6.B Proton
7.D phosphorus
8.B 12 neutrons
9.A 5 valence electrons
10.D Boron is in the same group as aluminum and has three valence electrons.
11.A Cs and O
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