Chapter 5

Question 1

Mendeleev

Answer 1

organized the periodic table by the properties and made guesses as to the properties of unidentified elements

Question 2

Cannizzaro

Answer 2

found a new way to measure mass

Question 3

Mosely

Answer 3

found the Periodic Law: physical and chemical properties of elements are functions of their atomic numbers

Question 4

Mendeleev’s periodic table did not include…

Answer 4

noble gases, lanthanides, actinides

Question 5

ion

Answer 5

has a negative - or positive + charge

Question 6

isoelectric

Answer 6

same electron configuration

Question 7

cation

Answer 7

positively charged ion

Question 8

anion

Answer 8

negatively charged ion

Question 9

ionization energy

Answer 9

the amount of energy to remove one electron from an atom

Question 10

2nd ionization energy

Answer 10

removes a second electron after one is removed, requires more energy

Question 11

Which element has the lowest ionization energy?

Answer 11

Francium (bottom left)

Question 12

Which element has the highest ionization energy?

Answer 12

Helium (top right)

Question 13

electronegativity

Answer 13

the ability of an atom to hold its own electrons or attract electrons from other atoms

Question 14

Which element has the highest electronegativity?

Answer 14

Fluorine

Question 15

Which element has the second highest electronegativity?

Answer 15

Oxygen

Question 16

Which element has the lowest electronegativity?

Answer 16

Francium