Reading the period table

Atomic Mass equals the combined number of

• Protons and Electrons

• Electrons and Neutrons

• Protons and Neutrons

Each proton will attract one electron because...

• Protons are positive, electrons a negative
• protons are positive and electrons are positive
• both electrons and protons are negative
• neutrons have no charge so don't have any effect

Tags

NGSS.MS-PS2-5

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

Who atomic model said electrons orbit the atom like planets orbit the sun 

• Einstein
• Thomson 
• Bohr 
• Dalton 

Which of these is the electron?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-1

How many protons does this atom have?

• 2.5
• 6
• 5
• 10.811

Tags

NGSS.MS-PS1-1