Bonding Part I

What is the total number of electrons shared in a single covalent bond between two atoms?

2

Which symbol represents a particle that has the same total number of electrons as S2-?

Ar

Which of the following Group 2 elements has the LOWEST first ionization energy?

Ba

Which formula represents a nonpolar molecule?

CF4

Which molecule is nonpolar?

CO2

Explain, in terms of structure and/or distribution of charge, why CO2 is a nonpolar molecule?

CO2 is Symmetrical

Which compound contains ionic bonds?

CaO

Which change occurs when a barium atom loses two electrons?

It becomes a positive ion and its radius decreases.

Which of these elements has the least attraction for electrons in a chemical bond?

Nitrogen

Which atom, when bonded as shown, has the same electron configuration as an atom of argon?

Sulfur

What occurs when an atom of chlorine forms a chloride ion?

The chlorine atom gains an electron, and its radius becomes larger.

A substance that does not conduct electricity as a solid but does conduct electricity when melted is mots likely classified as

an ionic compound

Which of the following atoms has the greatest tendency to attract electrons?

bromine

From which of these atoms in the ground state can a valence electron be removed using the LEAST amount of energy?

carbon

Which element has atoms that can form single, double, and triple covalent bonds with other atoms of the same element?

carbon

Which type of chemical bond is formed between two atoms of bromine?

covalent

The strength of an atom's attraction for the electrons in a chemical bond is the atom's

electronegativity

The strength of an atom's attraction for the electrons in a chemical bond is the atoms's

electronegativity

As a chlorine atom becomes a negative ion, the atom

gains an electron and its radius increases

When an atom of phosphorus becomes an ion (P3-), the radius

increases

Compared to the radius of a chlorine atom, the radius of a chloride ion is

larger because chlorine gains an electron

As two chlorine atoms combine to form a molecule, energy is

released