Atoms and the Periodic Table

All matter is made of _________. 

• energy 
• atoms 
• electrons 
• compounds 

In the modern periodic table, elements are arranged by:

• atomic mass

• atomic number

• valence electrons

• number of isotopes

• Periods
• Groups

• Periods
• Groups

Which two subatomic particles are found in the NUCLEUS of at atom?

• protons & nuetrons
• protons & electrons
• neutrons & electrons
• electrons & protons

The mass of a proton is _______.

• 1 amu
• 1 gram
• has no mass
• undetermined

Which particle has a similar mass to a proton?

• Electron
• Neutron
• Photon
• Marble

Which item on this element square represents the atomic number?

• 13
• Al
• Aluminum
• 26.981538

Which item on this element square represents the atomic mass?

• 13

• Al

• Aluminum

• 26.981538

How many protons does an atom of Carbon have? 

• 3
• 12.011
• 6
• none