Periodic Trends 4

Question 1

Actinides and lanthanides fit into the table right after group

Answer 1

2A

Question 2

Lanthanides and actinides are often shown below main table because

Answer 2

The table would be too long to fit on the page

Question 3

Actinide elements range from

Answer 3

89

103

Question 4

Actinide elements are mostly _ elements

Answer 4

Man-made

Question 5

Actinide elements don’t exist in

Answer 5

Nature

Question 6

Only two actinide elements that exist in nature (2)

Answer 6

Uranium

Plutonium

Question 7

Lanthanides are called

Answer 7

Rare-earth metals

Question 8

Lanthanide elements range from

Answer 8

57

71

Question 9

Lanthanide elements have properties that are similar to

Answer 9

Lanthanide

Question 10

When you look at the periodic table, you can see

Answer 10

Trends

Question 11

The trends in the periodic table explain

Answer 11

The properties of each element

Question 12

The properties to be aware of include (ar,ir)

Answer 12

Atomic radius

Ionic radius

Question 13

The properties to be aware of include (ie,re)

Answer 13

Ionization energy

Reactivity electronegativity

Question 14

The properties to be aware of include

Answer 14

Valence electrons

Question 15

It is important to understand how the _ affect the electrons in the outer shell

Answer 15

Protons in the nucleus

Question 16

How protons in nucleus affect electrons in outer shell is called

Answer 16

Effective nuclear charge

Question 17

Effective nuclear charge is the net or total positive charge felt by

Answer 17

An electron in an atom with multiple electrons

Question 18

In an atom with more than one electron, the positive charge from protons is

Answer 18

Distributed among the electrons

Question 19

Positive charge distributed among electrons so that

Answer 19

Full positive pull is not felt by any one electron

Question 20

In atoms with multiple levels of electrons

Answer 20

Valence electrons are shielded from full force of pull from protons by lower levels of electrons

Question 21

Shielding effect is the balance between positive force from protons on valence electrons and

Answer 21

Repulsion from inner electrons

Question 22

_ is the measure of the size of the atoms

Answer 22

Atomic radius

Question 23

Atomic radius is typically the distance from the center of nucleus to

Answer 23

Outermost electron