Answer this carefully.

#1: True Or False

1. In Bohr-Rutherford diagram,
neutrons are typically located in the rings around the nucleus.

2. Electrons are negatively charged subatomic particle discovered by Rutherford.

3. Protons have similar masses compared to neutron.

4. John Dalton proposed the law of multiple proportions.

5. Isotopes are elements that have the same number of protons but not neutrons.

6. The nucleus of an atoms contains its protons and neutron.

7. Schrödinger proposed that it is impossible to determine the exact location of an electron.

8. Rutherford discovered the positively charged subatomic particle.

9. Thompson used gold film and alpha particle to examine the nucleus of atom.

10. Democritus theorized “atomos” as indestructible, indivisible pieces of matter.



#2: Multiple Choices

1.What is the negatively charged particle that moves around the nucleus of an atom?
A. atom
B. electron
C. neutron
D. proton

2. What is the positively charged particle in the nucleus of an atom?
A. atom
B. electron
C. neutron
D. proton

3. Why does an atom have no net electric charge?
A. Its subatomic particles carry no electrical charge.
B. The positively charged protons cancel out the negatively charged neutrons.
C. The positively charged neutrons cancel out the negatively charged electrons.
D. The positively charged protons cancel out the negatively charged electrons.

4. What is an isotope? An element with ____.
A. equal number of protons and neutrons
B. differing numbers of protons and electrons
C. differing number of protons and neutrons
D. equal number of protons and electrons

5. Compared to the charge and mass of a proton, an electron has _____.
A. the same charge and a smaller mass.
B. the same charge and the same mass.
C. opposite charge and smaller mass.
D. opposite charge and the same mass

6. The nucleus of an atom is positively charged particle and its mass is almost the total mass of the atom itself. These hold true because the nucleus is made up of _____ .
A. protons
B. protons and electrons
C. protons and neutrons
D. electrons and neutrons

7. Atoms of a given element always have the same number of _____ .
A. isotopes
B. neutrons
C. nucleons
D. protons

8. Which statement below correctly describes a neutron?
A. It is positive and is located inside the nucleus.
B. It is negative and is located inside the nucleus.
C. It is negative and is found outside the nucleus.
D. It has no charge and is located inside the nucleus.

9. Which subatomic particle has a positive charge?
A. electron
B. neutron
C. positron
D. proton

10. Which subatomic particle orbit the nucleus of an atom?
A. electron
B. neutron
C. nucleus
D. proton
Other:

11. All the given statements are true EXCEPT:
A. An isotope is any of the two or more atoms of an element having the same atomic mass but different atomic numbers.
B. Mass number is equal to atomic number.
C. Mass number is the total number of protons and neutrons in an atom.
D. The number of protons in an atom is the atomic number

12. Which sub-atomic particle identifies the chemical behavior of an atom?
A. Electron
B. Nucleus
C. Neutron
D. Proton

13. Which is NOT true about sub-atomic particles?
A. Electrons are negatively charged particles
B. Neutrons are found outside the nucleus.
C. Protons are found in the nucleus of an atom.
D. Protons are slightly lighter than neutrons.

14. Which number of sub-atomic particles (in the order of proton, electron, and neutron) represents copper (Cu) atom? A. 29, 35, 29
B. 29, 29, 35
C. 29, 29, 64
D. 35, 29, 64


​