Chemical Bonds

What is an example of a covalent bond?

• The bond between two hydrogen atoms to form H2.

• The bond between sodium and chlorine in NaCl.

• The bond formed between two calcium atoms in Ca2.

• The bond formed between a metal and a non-metal.

What is the charge of an ion formed by losing electrons?

• Negative

• Neutral

• Positive

• Variable

What is electronegativity?

• A measure of an atom's ability to attract and hold onto electrons.

• The energy required to remove an electron from an atom.

• The tendency of an atom to lose electrons in a chemical reaction.

• The measure of an atom's size in a molecule.

How do metals in groups 1-3 typically achieve a full outer shell?

• By gaining electrons

• By sharing electrons

• By losing electrons

• By forming covalent bonds

What are valence electrons?

• Electrons that are found in the nucleus of an atom.

• Electrons in the outermost shell of an atom that are involved in forming bonds.

• Electrons that are responsible for the mass of an atom.

• Electrons that are always paired with another electron.

What happens to electrons in covalent bonding?

• Electrons are transferred from one atom to another.

• Electrons are shared between atoms.

• Electrons are lost during the bonding process.

• Electrons are created during the bonding process.

What happens to electrons in ionic bonding?

• Electrons are shared between atoms.

• Electrons are transferred from one atom to another.

• Electrons are created during the bonding process.

• Electrons are lost and never regained.

What is a molecule?

• A single atom that cannot be broken down further.

• A group of two or more atoms bonded together, which can be of the same or different elements.

• A type of chemical reaction involving atoms.

• A large structure made up of many cells.

What is an example of an ionic bond?

• The bond between hydrogen (H) and oxygen (O) to form water (H2O).

• The bond between sodium (Na) and chlorine (Cl) to form sodium chloride (NaCl).

• The bond between carbon (C) and hydrogen (H) to form methane (CH4).

• The bond between nitrogen (N) and oxygen (O) to form nitrogen dioxide (NO2).

What is the charge of an ion formed by gaining electrons?

• Positive

• Neutral

• Negative

• Variable