U2 Review (Zeph)

Front

Who is most known for the planetary atomic model?

Back

Bohr

Front

What happens to the charge of a neutral atom that gains two electrons?

Back

The charge becomes -2.

Front

How many protons does a new isotope of Carbon with a molar mass of 15g have?

Back

6 protons.

Front

What series do elements 57-71 belong to?

Back

Lanthanide series.

Front

What atomic model came after the plum pudding model?

Back

Nuclear model.

Front

Define an isotope.

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the charge of a proton?

Back

+1.

Front

What is the charge of an electron?

Back

-1.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of the atomic mass unit (amu)?

Back

It is a standard unit of mass that quantifies mass on an atomic or molecular scale.