Atoms and Reactions (Module 2.1)

What is the relative weight of an electron?

• 1/1000

• 1/2000

• -1

• 0

Isotopes of the same element have...

• Same mass

• Different mass

• Same number of protons and electrons

• Different number of neutrons

The atomic number is also known as..

• A(proton number)

• z (proton number)

• A (neutron number)

• Z ( neutron number)

What is the mass number also known as?

• z ( proton number)

• A ( proton number)

• A (nucleon number)

• z (nucleon number)

Different isotopes of the same element react...

• Differently

• Similarly

• The same

• Oppositely

What is the letter symbol for the relative atomic mass?

• Mr

• Ar

• Br

• Zr

A molecule is ...

• Simple contently bonded

• Ionic bonded

• Any bonded elements

• A pair of bonded elements

- is the mean of an atom of an isotope compared with 1/12th of the mass of an atom of carbon-12

Relative Atomic Mass- the weighted mean mass of an atom of an element compared with 1/12th of the mass of .....

What are the units of relative atomic mass?

• g/cm2

• g

• mol

• There are no units