Atoms and the Periodic Table

The atomic theory...

•  gives an idea about what the atoms looks like
• states that all matter is made of atoms
• has changed over time
• All of these are correct

Atoms are made of protons, neutrons, and

• atomic numbers
• electrons
• moles
• ions

Tags

NGSS.MS-PS1-1

Protons are found in the _________ of an atom

• nucleus
• outer energy shells
• ribosome
• positive space

Electrons are...

• smaller than protons and electrons
• negatively charged
• found around the nucleus
• all of these are correct

Atomic Mass - Atomic number= 

• number of neutrons
• number of protons
• atomic radius
• all of these are correct

What is the symbol of Iron?

• I
• Ir
• Fe
• iron is not an element

How many electrons in a stable atom of lithium?

• 3
• 4
• 7
• 10

Tags

NGSS.HS-PS1-1

Elements that have similar properties are in the same

• family/column
• horizontal row
• period
• atomi

The 5th column on the periodic table...

• Has elements with 5 valence electrons
• has elements with similar properties
• is called the nitrogen family
• all of these are correct

More reactive elements are found on the...

• left side of the periodic table
• right side of the periodic table