Unit 1 Atoms and the Periodic Table

The Atom

100

This is the positively charged particle in an atom's nucleus

Proton

200

This is the negatively charged particle that orbits the nucleus.

Electron

300

This subatomic particle has no charge and is found in the nucleus.

Neutron

400

The atomic number of an element is determined by the number of these particles.

Protons

500

Two atoms of the same element with a different number of neutrons are called this.

Isotope

The Periodic Table

100

The Periodic Table is made up of elements that are metals, nonmetals and metalloids.

True

200

The rows of the periodic table are called this.

Periods

300

This group of non-reactive gases is found in the last column of the periodic table.

Noble Gases

400

The total number of protons and neutrons in an atom is known as this.

Atomic Mass or Atomic Weight

500

Elements in the same column or group of the periodic table have similar properties because they have the same number of these.

They have the same number of valence electrons

Valence Electrons

100

These are the electrons in an atom's outermost shell.

Valence electrons

200

An atom with 8 electrons in its outer shell is generally considered to be stable.

True

300

I am the model showing valence electrons

Lewis Dot Structure

400

There are three elements with one electron in the outer shell/energy level in the first 18 elements.  List the elements with only 1 electron in the outer shell.

Hydrogen (H), Lithium (Li), and Sodium (Na)

500

I am the model that shows how electrons orbit the nucleus.  

The Bohr Model

What's my name

100

I have very important for healthy teeth and bones.  What is my name and atomic number?

Calcium 20

200

I have 6 valence electrons and 16 protons.

Sulfur

300

I am the only noble gas with 2 electrons.  What is my name?

Helium

400

I am a gas with 8 neutrons.  What is my name? 

Oxygen

500

I am the element you eat when you have leg cramps.  What is my name and atomic number?

Potassium 19

The Atomic Mass

100

Aluminum (Al) has a atomic mass of 26.98.  What would the atomic mass number be?

27

200

Silver (Ag) has an atomic mass of 107.87.  What would the atomic mass number be?

108

300

Chlorine (Cl) has an atomic mass of 35.45.  What would the atomic mass number be?

35

400

Krypton (Kr) has an atomic mass of 84.80.  What would the atomic mass number be?

85

500

Calcium has an atomic mass of 40.08.  What would the atomic mass number be?

40