chemistry 1 test review

An atoms nucleus is composed of 

• protons
• neutrons
• protons and neutrons
• electrons

All matter is made of 

• energy 
• atoms 
• air
• chemistry

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 

Neutrons are

• negative
• positive
• neutral
• cows

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

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

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

• negatrons 
• electrons 
• neutrons 
• protons 

Which statement best describes an electron?

• Smaller mass than a proton and a negative charge
• Smaller mass than a proton and a positive charge
• Greater mass than a proton and a negative charge
• Greater mass than a proton and a positive charge

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