IGSCE - Diagnostic Test

Which of the following statements is correct about particles in a gas?

• They are packed closely
• They move randomly
• They do not move
• They have no energy

What happens to the particles when a solid melts?

• They move more slowly
• They vibrate less
• They move freely
• They stop vibrating

Which particle has a relative charge of –1?

• Proton
• Neutron
• Electron
• Nucleus

The atomic number of an element is 11 and its mass number is 23. How many neutrons does it have?

• 12
• 11
• 23
• 34

Which of the following is an isotope of carbon?

• ¹²C
• ¹³C
• ¹⁴C
• All of the above

Electrons are located in:

• The nucleus
• Shells around the nucleus
• Neutrons
• Protons

What is a property of Group I elements?

• High melting point
• Decrease in reactivity down the group
• Form acidic oxides
• Form +1 ions

Which of the following is a halogen?

• Helium
• Fluorine
• Neon
• Magnesium

Which of the following is a transition metal?

• Sodium
• Calcium
• Iron
• Argon

What type of bonding is found in NaCl?

• Ionic
• Covalent
• Metallic
• Hydrogen