The Structure of Atom Quiz 1

Which of the following substances is made up of atoms?

• Iron

• Nitrogen

• Water

• Sodium chloride

A gas jar containing air was placed on top of a gas jar of bromine. After some time, a unifirm colour was observed throughout both gas jars. What process has occured?

• Sublimation

• Diffussion

• Evaporation

• Condensation

Which of the following statements is true about the Kinetic Theory of Matter?

• The particles in liquids are packed closely together in an orderly manner

• The particles in solids move randomly

• The forces between the particles of gases are stringer that those of liquids

• The energy content of a gas is higher than that of a solid

An atom of chlorine-37 has 17 electrons. How many neutrons does an atom of chlorine-37 contain?

• 17

• 20

• 37

• 54

The nucleus of an atom contains..

• electrons only

• neutrons only

• both protons and neutrons

• both protons and electrons

Which of the following scientists dicovered the electron?

• J.J Thomson

• Ernest Rutherford

• Niels Bohr

• James Chadwick

An atom of element Y has 18 rpotons and 22 neutrons in its nucleus.

What is the number of valence electrons in atom Y?

• 2

• 4

• 5

• 8

Which of the following shows the electron arrangement of an atom of

Nitrogen (N₂) with 7 proton numbers and 15 nucleon numbers.

• 2.5

• 2.6

• 2.8.5

• 2.8.6

Table 1 shows the proton numbers, nucleon numbers and numbers of electrons of four particles.

Which of the following pairs of particles are isotopes of the same element?

• G and L

• J and L

• L and M

• J and M

• I and II

• I and III

• II and III

• III and IV