End of module 3 Review Packet

Front

What is the positively charged, dense portion of an atom that contains most of its mass?

Back

Nucleus

Front

What type of electromagnetic wave has high penetrating power?

Back

Gamma waves

Front

Which radioactive particle is represented by the symbol 'α'?

Back

Alpha particle

Front

What atomic particle determines the identity of an element?

Back

Protons

Front

How do you calculate the average atomic mass of an element using isotopic abundance?

Back

Multiply the mass of each isotope by its percent abundance (as a decimal), then sum the results.

Front

What is the average atomic mass of iron (Fe) given the isotopes and their abundances: Iron 54 (6%), Iron 56 (92%), Iron 57 (2%)?

Back

55.9 amu

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of a neutron?

Back

Neutral

Front

What is the charge of an electron?

Back

Negative

Front

What is the significance of the atomic number of an element?

Back

It represents the number of protons in the nucleus and determines the element's identity.