Unit 5: Periodic Trends Test Review

A vertical column on the periodic table is called a ___ Group

The periodic table was first arranged by the scientist ___ Mendeleev

The elements in the periodic table are presently arranged in order of increasing ___ Atomic Number

The ___ says that when the elements of the periodic table are arranged in order or increasing atomic number, there are periodic patterns in the physical and chemical properties. Period law

Group 1 is also known as the ___ Alkali Metals

The d block elements are known as the ___ Transition metals

An atom with a positive or negative charge is called an ___. It becomes charged when it loses or gains ___. Ion; electron

The size of an atom is due mainly to the number of occupied ___ that the atom has. Energy levels

As you move across a period from left to right, the size of an atom will ___. This is due to the increased number of ___. Decrease; Protons

As you move down a group, the size of the atoms will ___ due to a greater number of ___ as you move down a group. Increase; Energy levels

The amount of energy required to remove the most loosely held electron from an atom is called the ___ Ionization energy

The amount of energy required to remove a second or third electron from an atom is always ___ than the amount of energy required to remove the first electron. Greater

For Potassium, we would expect a large increase in ionization energy to occur when the ___ electron is removed. This is because potassium will have the same electron configuration as a ___ before that electron is removed. 2nd; Noble gas

Ionization energy will increase as you move ___ and decrease as you move ___. Across a period; down a group.

The size of a positive ion is always ___ than the size of the neutral atom from which it was made. Least

The size of a negative ion is always ___ than the size of the neutral atom from which it was made. More

Fluorine has the highest electronegativity with a value of ___ 4.0

Electronegativity is the ability of an atom to attract electrons to itself when the atom is in a ___ chemical bond

Electronegativity will ___ as you move down a group. Decrease

The elements in group __ do not have defined values for electronegativity. 18

Electronegativity will ___ as you move across a period. Increase