Homework - revision for AC2

• Science
• Lower Secondary (Key Stage 3)

Homework - revision for AC2

Why does a sodium ion have the overall charge of +1 but a sodium atom has no overall charge?

Compare and contrast Na atoms and Na ions.

Describe what happens when elements bond covalently

What type of bond involves the sharing of electrons between atoms?

1. Metallic bond
2. Ionic bond
3. Hydrogen bond
4. Covalent bond

Which of the following is a characteristic of a covalent bond?

1. Strong electrostatic attraction
2. Shared electrons
3. Transfer of electrons
4. Formation of ions

What is the primary bonding force in a covalent bond?

1. Electrostatic force
2. Magnetic force
3. Gravitational force
4. Van der Waals force

What is the nature of the bond between two nonmetal atoms in a covalent bond?

1. Unstable
2. Weak
3. Strong
4. Temporary

What is the typical bond length in a covalent bond?

1. Variable
2. Infinite
3. Long
4. Short

Describe metallic bonding.

What type of bonding involves the sharing of delocalized electrons between metal atoms?

1. Hydrogen bonding
2. Covalent bonding
3. Metallic bonding
4. Ionic bonding

What is the primary reason for the high electrical conductivity of metals?

1. Ionic bonds
2. Delocalized electrons
3. Molecular structure
4. Covalent bonds

What is the typical state of matter for metals at room temperature?

1. Plasma
2. Solid
3. Liquid
4. Gas

What property of metals allows them to be hammered into thin sheets?

1. Malleability
2. Rigidity
3. Flexibility
4. Brittleness

What is the term for the ability of metals to be drawn into wires?

1. Ductility
2. Inertia
3. Elasticity
4. Fracture toughness

Which one shows a
covalent bond?

1. Left: because they are sharing electrons
2. Right: because electrons are transferred
3. Both
4. None

Which of the following will not be involved in a covalent bond?

1. carbon
2. magnesium
3. hydrogen
4. fluorine

Covalent bonds are formed between non metals:

Which of the following will not be involved in a covalent bond?

1. carbon
2. magnesium
3. hydrogen
4. fluorine

Which of the following elements will not form a covalent bond?

1. Helium
2. Boron
3. Sulfur
4. Iodine

Which type of bond forms ions

1. metallic
2. covalent
3. ionic

Which bond does not form ions

1. metallic
2. covalent
3. ionic

In an ionic bond, electrons are transferred from the ______ to the ______.

1. Orbital, suborbital
2. Metal, nonmetal
3. Valence, core
4. Nonmetal, metal

Define ionic bonding

1. Electrostatic attraction between two charged ions
2. Electrostatic attraction between two similarly charged ions
3. Electrostatic attraction between two oppositely charged ions
4. Electrostatic attraction between two non charged ions

Ionic bonding occurs in...

1. Metals
2. Metals and non-metals
3. Non-metals

Which of the following is a characteristic of covalent bonds?

1. They are typically found in metals.
2. They are formed between nonmetal atoms.
3. They involve the transfer of electrons.
4. They are always polar.

In a double covalent bond, how many pairs of electrons are shared between the bonded atoms?

1. Three pairs
2. Two pairs
3. One pair
4. Four pairs

What is the strongest type of chemical bond?

1. Van der Waals bond
2. Hydrogen bond
3. Covalent bond
4. Ionic bond

Which of the following is a characteristic of an ionic bond?

1. Formation of ions
2. Sharing of electrons
3. High electrical conductivity
4. Malleability and ductility

What type of bonding involves the transfer of electrons?

1. Covalent bonding
2. Metallic bonding
3. Hydrogen bonding
4. Ionic bonding

What happens to the electrons in an ionic bond?

1. Formation of molecular orbitals
2. Transfer from one atom to another
3. Sharing between atoms
4. Absorption into the nucleus

What type of bonding happens in diamond?

1. Covalent
2. Ionic
3. Metallic

Which type of bonding shares electrons?

1. Covalent
2. Ionic
3. Metallic

Which type of bonding happens in alloys?

1. Covalent
2. Ionic
3. Metallic