atoms last semester revision

all matter is made up of what?

• atoms

• electrons

• cells

The positive particles of an atom are 

• electrons

• neutrons

• protons

True or False? Neutrons have a negative charge

• true

• false

Which subatomic particles contribute the most to the mass of an atom?

• Protons and Neutrons

• Protons only

• Electrons only

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

• nucleus 

• core 

• center

• electron cloud

which of the following are lab safety rules for this class (there is more than correct answer, choose all that are right)

• Long hair should be tied back

• Treat all chemicals as dangerous

• Only enter a science lab if a teacher is present

• Only liquids can be placed in the sinks

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

• electrons

• protons 

• neutrons 

A particle that moves around the nucleus is a/an

• proton

• electron

• neutron

True or False electrons are negatively charged

• true

• false

A charged particle that has gained or lost electrons is called a _____.

• compound

• ion

• element