Unit 8 Review

Which part of a helium atom is positively charged?

• Electron

• Neutron

• Nucleus

• Orbital

Which pair of elements form an ionic bond with each other?

• KCl

• ICl

• PCl

• HCl

An atom of any element must contain

• an equal number of protons and neutrons

• an equal number of protons and electrons

• more electrons than neutrons

• more electrons than protons

Properties of carbon are expected to be most similar to those of

• Boron (B)

• Aluminum (Al)

• Silicon (Si)

• Phosphorus (P)

Which type of bond is formed by the transfer of electrons from one atom to another?

• Covalent bond

• Hydrogen bond

• Ionic bone

• Coordinate covalent bond

More than 2/3 of the elements of the periodic table are -

• Metalloids

• Metals

• Nonmetals

• Noble gases

Atomic mass of an atom is equal to the number of

• Neutrons only

• Protons only

• Neutrons + Protons

• Electrons + Protons

Which two particles have approximately the same mass?

• Neutron & Electrons

• Neutron & Deuteron

• Proton & Neutron

• Proton & Electron

Which kind of bond is formed when two atoms share electrons to form a molecule?

• Ionic

• Metallic

• Electrovalent

• Covalent

The bonds present in silicon carbide (SiC) are

• Covalent

• Ionic

• Metallic

• Van der Waals