Unit 1: Fundamental Concepts in Chemistry

1. Which of the following is the correct definition of chemistry?
a) The study of living organisms
b) The study of matter and its transformations
c) The study of celestial bodies
d) The study of electrical currents

2. Which of the following is NOT a major branch of chemistry?
a) Organic chemistry
b) Physical chemistry
c) Biological chemistry
d) Geological chemistry

3. The SI unit for length is:
a) Kilogram
b) Ampere
c) Meter
d) Second

4. Precision is a measure of:
a) How close a measurement is to the true value
b) How consistent a set of measurements are with each other
c) How small the uncertainty in a measurement is
d) How fast a reaction occurs

5. The number of significant figures in the measurement 0.00320 is:
a) 2
b) 3
c) 4
d) 5

Unit 2: Atomic Structure and the Periodic Table

6. Dalton's atomic theory states that:
a) Atoms are indivisible and indestructible
b) Atoms contain protons, neutrons, and electrons
c) Atoms can be created or destroyed in chemical reactions
d) Atoms have different isotopes

7. The discovery of the electron was made by:
a) John Dalton
b) J.J. Thomson
c) Ernest Rutherford
d) James Chadwick

8. The atomic mass of an element is determined by the number of:
a) Protons
b) Electrons
c) Neutrons
d) Isotopes

9. The Bohr model of the hydrogen atom describes electrons as:
a) Orbiting the nucleus in fixed circular paths
b) Existing in a cloud of probability
c) Spread evenly throughout the atom
d) Located in the nucleus

10. The quantum mechanical model of the atom uses __ to describe the location of electrons.
a) Energy levels
b) Orbitals
c) Shells
d) Nuclei

for model exam mathematics specific point
Vector magnitude and direction
Volume of cone
Matrix determinant
Local.max
Derivative
Application of derivative
Sequence arthimetic mean between m an n
Trig application
Grade 10 mathematics unit 5 review questions (1) question
Quartile IQR

Polynomial coefficient and constant

Check out table of specification

5) Which group of organisms can convert nitrogen gas (N2) into ammonia (NH3) through a biological process?

A) Fungi
B) Plants
C) Nitrogen-fixing bacteria
D) Protozoa

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