2-1 Atoms, Elements, Compounds

The positive particles of an atom are 

• electrons 
• atoms
• neutrons 
• protons 

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

• nucleus 
• electron cloud
• core 
• center 

Tags

NGSS.HS-PS1-8

Neutrons are

• negative
• positive
• neutral
• cows

an atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

An atom's mass number equals the number of...

• protons plus the number of electrons
• protons plus the number of neutrons
• protons
• neutrons

A particle that moves around the nucleus is a(n)...

• Proton
• Neutron
• Electron
• Quark

Atoms have no electric charge because they...

• have an equal number of charged and non charged particles
• have neutrons in their nuclei
• have an equal number of electrons and protons
• have an equal number of neutrons and protons

Electrons have this type of charge...

• negative
• positive
• neutral

How many electrons are in the element, Oxygen, with the atomic number of 8?

• 7
• 10
• 8
• 9

Tags

NGSS.HS-PS1-1

How many neutron are in the atom "K"?

• 7
• 2
• 39
• 20

Tags

NGSS.HS-PS1-7