Atomic Theory & Atomic Structure_Kennedy

Front

What is the formula to calculate the number of neutrons in an atom?

Back

Number of Neutrons = Atomic Mass - Atomic Number

Front

What is the atomic number of sodium (Na)?

Back

11

Front

What is the major difference between Thomson's Plum Pudding Model and Rutherford's Nuclear Model?

Back

Thomson's model had no nucleus.

Front

Which subatomic particle has a positive charge?

Back

Protons

Front

What is the mass of the most common isotope of Oxygen?

Back

16

Front

Define atomic mass.

Back

The weighted average mass of an element's isotopes.

Front

What are isotopes?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the nucleus of an atom?

Back

The central part of an atom containing protons and neutrons.

Front

What is the role of protons in an atom?

Back

They determine the atomic number and identity of the element.