First Term Examination Questions Chemistry SS 1 First Term Lesson Notes Week 12

Week 12 – First Term Examination for SS 1 Chemistry

Topics Covered: Introduction to Chemistry, Particulate Nature of Matter, Symbols, Formulae and Equations, Chemical Combinations, and States of Matter

Exam Instructions for Teachers and Students

For Teachers:

1. Supervise the exam room with integrity and fairness.
2. Ensure all students are seated according to the seating plan.
3. Prevent any form of communication among students during the exam.
4. Be vigilant and observant to identify any signs of malpractice.
5. Collect all exam materials (scratch paper, extra sheets) at the end of the exam.

For Students:

1. Arrive on time and bring all necessary materials (pen, pencil, eraser, etc.).
2. Do not bring unauthorized materials (phones, notes, textbooks) into the exam room.
3. Answer each question on your own; avoid copying or discussing answers with others.
4. Respect the rules and follow all instructions given by your teacher.
5. Cheating is not tolerated and may result in disqualification.

Part A: Objective Questions (30 Fill-in-the-Blank with Options)

1. The __________ is the smallest particle of an element.
   a) atom
   b) molecule
   c) electron
   d) neutron
2. An atom’s atomic number represents the number of __________ it has.
   a) neutrons
   b) protons
   c) electrons
   d) atoms
3. __________ are particles with no charge found in the atom’s nucleus.
   a) Neutrons
   b) Electrons
   c) Protons
   d) Ions
4. The __________ table organizes all known elements.
   a) atomic
   b) element
   c) periodic
   d) molecular
5. In ionic bonds, electrons are __________.
   a) shared
   b) transferred
   c) split
   d) combined
6. Atoms of the same element with different masses are called __________.
   a) ions
   b) isotopes
   c) molecules
   d) compounds
7. The simplest formula of a compound is known as the __________ formula.
   a) empirical
   b) molecular
   c) structural
   d) ionic
8. The __________ number is the sum of protons and neutrons in an atom.
   a) mass
   b) atomic
   c) energy
   d) electron
9. Protons have a __________ charge.
   a) positive
   b) negative
   c) neutral
   d) varying
10. Solid matter has a __________ shape and volume.
    a) fixed
    b) changing
    c) undefined
    d) fluid
11. The chemical formula for water is __________.
    a) H2
    b) O2
    c) H2O
    d) HO2
12. __________ bonds are formed by sharing electrons.
    a) Ionic
    b) Covalent
    c) Metallic
    d) Van der Waals
13. __________ is when a solid turns directly into a gas.
    a) Melting
    b) Sublimation
    c) Condensation
    d) Freezing
14. The __________ theory explains the motion of particles in matter.
    a) kinetic
    b) atomic
    c) molecular
    d) periodic
15. Atoms with the same number of protons but different numbers of neutrons are called __________.
    a) ions
    b) isotopes
    c) molecules
    d) compounds
16. Water changes from liquid to gas during __________.
    a) freezing
    b) evaporation
    c) melting
    d) sublimation
17. __________ is known as the father of modern chemistry.
    a) Dalton
    b) Mendeleev
    c) Lavoisier
    d) Thomson
18. __________ is the smallest unit of a compound.
    a) Atom
    b) Molecule
    c) Proton
    d) Neutron
19. In __________, particles are tightly packed together.
    a) gas
    b) liquid
    c) solid
    d) plasma
20. The __________ formula shows the actual number of atoms in a compound.
    a) empirical
    b) molecular
    c) atomic
    d) structural
21. The __________ table arranges elements by increasing atomic number.
    a) kinetic
    b) periodic
    c) compound
    d) isotope
22. A __________ is formed when two or more atoms bond together.
    a) molecule
    b) isotope
    c) proton
    d) mixture
23. __________ bonds involve electron sharing.
    a) Covalent
    b) Ionic
    c) Metallic
    d) Intermolecular
24. Atomic __________ refers to the number of protons in the nucleus.
    a) weight
    b) number
    c) mass
    d) radius
25. Metals are known to __________ electricity.
    a) conduct
    b) reflect
    c) resist
    d) absorb
26. The __________ law states that matter cannot be created or destroyed.
    a) kinetic
    b) conservation
    c) periodic
    d) atomic
27. Elements in the same __________ have similar properties.
    a) period
    b) group
    c) state
    d) isotope
28. A __________ is a substance with a fixed composition.
    a) compound
    b) mixture
    c) element
    d) particle
29. Neutrons have __________ charge.
    a) a positive
    b) a negative
    c) no
    d) a variable
30. Electrons orbit the __________ of the atom.
    a) nucleus
    b) shell
    c) molecule
    d) neutron

Part B: Theory Questions (Short Answer)

1. Define atomic number.
2. What is a proton?
3. Explain covalent bonding.
4. What does the kinetic theory describe?
5. Define an atom.
6. What is the difference between a compound and a mixture?
7. Name the three states of matter.
8. What is the law of conservation of mass?
9. Describe an isotope.
10. What is the periodic table?
11. How does an ionic bond form?
12. State Dalton’s atomic theory.
13. Define sublimation.
14. Explain the term “atomic mass.”
15. What is a molecule?
16. Define empirical formula.
17. Explain why water is a compound.
18. What are isotopes?
19. Describe atomic structure.
20. Define ion.
21. Explain the term “period” in the periodic table.
22. What is a chemical symbol?
23. Describe Van der Waals forces.
24. Define relative atomic mass.
25. What is a metallic bond?
26. State the difference between solids and liquids.
27. Describe the electron arrangement in atoms.
28. What is atomic weight?
29. Explain the difference between physical and chemical changes.
30. Define atomic radius.

Part C: True or False Questions

1. Electrons are found in the nucleus. (True/False)
2. Atoms are the basic units of matter. (True/False)
3. Ionic bonds involve sharing electrons. (True/False)
4. Solids have a definite shape. (True/False)
5. Water can exist in three states of matter. (True/False)
6. Neutrons have no charge. (True/False)
7. Protons are negatively charged. (True/False)
8. Molecules are formed by chemical bonds. (True/False)
9. The periodic table arranges elements by atomic mass. (True/False)
10. Covalent bonds involve sharing electrons. (True/False)
11. Isotopes have the same atomic number but different masses. (True/False)
12. The atomic number is the total of protons and neutrons. (True/False)
13. Atoms in a gas are tightly packed. (True/False)
14. Van der Waals forces are strong bonds. (True/False)
15. Chemical symbols represent elements. (True/False)
16. Evaporation is a change from gas to liquid. (True/False)
17. Atomic mass includes protons and neutrons. (True/False)
18. The law of conservation of mass states matter cannot be destroyed. (True/False)
19. Mixtures have a fixed composition. (True/False)
20. Metals generally conduct electricity. (True/False)
21. A molecule is the smallest unit of a compound. (True/False)
22. Hydrogen bonds are strong bonds. (True/False)
23. Protons are found in the atom’s nucleus. (True/False)
24. Ionic bonds are strong bonds. (True/False)
25. Chemical equations show element symbols and formulas. (True/False)
26. Empirical formulas show exact numbers of atoms. (True/False)
27. Physical changes are usually reversible. (True/False)
28. A solid has no fixed volume. (True/False)
29. Metallic bonds are formed between metals. (True/False)
30. The kinetic theory explains the behavior of particles. (True/False)

Part D: Fill-in-the-Blank Questions (No Options)

1. Atoms are the smallest units of __________.
2. The __________ of an element shows its number of protons.
3. __________ bonds are formed by sharing electrons.
4. A solid has a __________ shape.
5. __________ is the process where liquid changes to gas.
6. __________ have no electrical charge.
7. A mixture has a __________ composition.
8. The __________ table organizes elements by atomic number.
9. An isotope has a different __________ number.
10. Protons are found in the atom’s __________.
11. The __________ theory describes particle movement.
12. __________ is the smallest unit of a compound.
13. Atomic __________ refers to the total number of protons and neutrons.
14. In an ionic bond, electrons are __________.
15. The chemical formula for water is __________.
16. __________ are substances with fixed compositions.
17. An __________ is formed by combining atoms.
18. Van der Waals forces are __________ bonds.
19. Solids are tightly __________ together.
20. A molecule of water has __________ hydrogen atoms.
21. Atomic mass includes protons and __________.
22. __________ are bonds between metal atoms.
23. The atomic __________ shows the number of protons.
24. Matter cannot be created or __________.
25. Chemical symbols represent __________.
26. An ion is an atom with a __________.
27. Chemical equations are balanced using __________.
28. Empirical formulas show __________ ratios.
29. __________ bonds involve giving or taking electrons.
30. __________ changes are usually irreversible.

Good luck, and remember to work honestly and carefully!