Unit 3 Chemistry Test

Metals are good conductors of what

Heat & Electricity

What state off what are metals at room temperature?

Solid

What element is the only one that is a liquid at room temperature?

Mercury (Hg)

What is Group 1 called?

Alkali Metals

Alkali Metals are what

Softener than most metals

How reactive are Alkali Metals?

Most reactive of metals

Group 2 is called what?

Alkaline Earth Metals

What is group 13 called?

Boron Group

What metal is the most abundant in Earths crust?

Aluminum

What is group 14 called?

Carbon group

Where is the carbon group found?

In all living matter, oils, natural gas, food & plants

What are groups 3-12 called?

Transition Metals

Where do transition metal most frequently found and in what form?

In nature in their pure element form

What is the second most abundant metal in earths crust?

Iron

Metallics are what type of conductor

Semi-conductor

What properties do metalloids have?

Properties of metals and non-metals

Non-metals are usually in what form at room temperature?

Gases or liquids

Non-Metals are what

Insulators

What is group 15 called?

Nitrogen group

Nitrogen is what percent of our air

78%

What is group 16 called?

Oxygen group

What percent of air is oxygen?

21%

What is the most abundant element in earths crust?

Oxygen

What is group 17 called?

Halogens

How reactive are halogens?

Very reactive

What is the most reactive halogen?

Fluorine

What is the only nonmetal to exist as liquid at room temperature?

Bromine

What is group 18 called?

Noble Gases

How are noble gases found?

As single atoms

Do noble gases combine with other elements naturally?

No because they are very stable

What noble gas is know as the lone ranger?

Hydrogen

What group is hydrogen found in?

Group 1

Elements in S&P sections are known as

Representatives elements

Element is D&F sections are known as

Transition Elements

electron are the only part of an atom involved in making what

Compounds or chemical reactions

Electrons equal what

Atomic number (energy levels)

What is the maximum number of electrons that the first energy level can hold?

2

What is the maximum number of electrons that the second energy level can hold?

8

What is the maximum number of electrons that the third energy level can hold?

18

What is the maximum number of electrons that the fourth energy level can hold?

32

What is a valence electron?

Electron found on the outermost energy level

What rule says that all atoms want to have 8 electrons in their last energy level?

Octet rule

What model developed a simple way to view valence electrons?

Lewis Model

What element is an exception to the Octet rule?

Helium

What diagram can be made to show how many electrons are in the outer energy level?

Dot Diagram

What are the two part of a dot diagram?

The chemical symbol & dots that represent valence electrons

What direction are valence electrons plotted on a dot diagram?

Right,left,top,bottom

What model is this?

Schrödinger’s Model

What principle says it is impossible to know both the position and velocity of an electron at the same time?

Heisenberg Uncertainty Principle

What principle says each electron occupies the lowest energy level available (closest to the nucleus)?

Aufbau Principle

Families with similar valence electrons within a group result in what

Similar chemical properties known as chemical reactivity

Half the distance between the nuclei of two atoms of the same element is known as the

Atomic radius

The atomic Radius increases in what direction

Left & down

Ion

An atom that has gained or lost an electron and has acquired a change is an

Losing an electron changes the charge to

Positive (cation)

Gain an electron changes the charge to

Negative (anion)

Ionization Energy

The energy required to remove an electron from an atom is called

High Ionization Energy equals what

Electron held tightly

What direction does ionization energy increase?

Up & right

Electronegativity

Ability of atoms to attract electrons in a chemical bond

Stronger electronegativity equals what

Stronger attraction

No electronegativity bales for what group?

Noble gases because the outer energy level is full

What direction does electronegativity increase?

Up & right