Ch 8, Sec 1

Q1. How are valence electrons different from other electrons in an atom?

A1. valence electrons are different because they are the electrons on the outer layer and they determine the atoms chemical properties.

Q2. Use the periodic table to identify three elements whose atoms are not likely to form bonds.

A2. helium, neon, and aragon ARE NOT LIKLEY TO FORM BONDS BECAUSE they are nobel gasses, group 18, and they already have 8 valence electrons so they dont need to bond

Q3. Describe chemical bonding

A3. chemical bonding is when atoms join to form new substances

Q4. Explain how to use valence electrons to predict if an atom will form bonds.

A4. you can use valence electrons to predict if an atom will form bonds by seeing how many valence electrons the atom has and seeing how many electrons it takes to make that number 0 or 8

Q5. How can an atom that has five valence electrons achieve a full set of valence electrons?

A5. an atom that has five valence electrons achieve a full set of valence electrons by combining to get the three other electrons it needs.this atom will gain electrons

Q6. Identify the number of valence electrons in a barium atom.

A6. it has two valence electrons because it is an alkali earth metal which is group 2

Q7. Use image in book... How many valence electrons are in a fluorine atom? Will fluorine atoms form bonds? Explain.

A7. there are 7 valence electrons in the fluorine atom. this atom will bond because ti needs one more electron to complete it's outer layer.