Chemistry SS2

Which subatomic particle is negatively charged?

• Proton

• Electron

• Neutron

• Nucleus

The nucleus of an atom contains...

• Protons and electrons

• Protons and neutrons

• Electrons only

• Neutrons only

Which of the following has 8 electrons in its outermost shell?

• Oxygen

• Neon

• Sodium

• Fluorine

Elements in the same group of the periodic table have...

• Same atomic mass

• Same number of protons

• Same number of valence electrons

• Same number of neutrons

Which of these is a noble gas?

• Argon

• Nitrogen

• Hydrogen

• Oxygen

An ionic bond is formed when...

• Electrons are shared

• Protons are transferred

• Electrons are transferred

• Neutrons are shared

Which of the following is a covalent compound?

• NaCl

• CaO

• H₂O

• KBr

What type of bond exists between two chlorine atoms in Cl₂?

• Ionic

• Covalent

• Metallic

• Hydrogen

What is the valency of nitrogen in ammonia (NH₃)?

• 1

• 2

• 3

• 4

Which of these substances conducts electricity when dissolved in water?

• Sugar

• Alcohol

• Salt (NaCl)

• Wax