Atomic Structure

Question 1

What are the parts of an atom?

Answer 1

Nucleus

Neutrons (no charge)

Electrons (1-)

Electron shell

Protons (1+)

Question 2

What are Protons, Neutrons and Electrons?

Answer 2

Proton stay in the nucleus of the atom. They have a charge of +1 and a mass of 1.

Neutrons stay in the nucleus of the atom. They have a charge of 0 and a mass of 1.

Electrons stay in the electron shells of the atom. They have a charge of -1 and a mass of 0.

Question 3

How to calculate the protons, electrons and neutrons?

Answer 3

The number of neutrons

atomic number = number of protons

If the element is NEUTRAL, then the number of electrons is the same as the number of protons.

atomic mass - atomic #

Question 4

How to calculate atomic mass?

Answer 4

Atomic Mass = # Protons + # Neutrons

Recall:
Protons have a mass of 1
Neutrons have a mass of 1
Electrons have a mass of 0

Question 5

How to write Standard Atomic Notation?

Answer 5

How an element’s information is written when not in the periodic table

atomic mass (rounded) recorded in the top left
atomic number at the bottom left

** the bigger number is always the mass **

Question 6

What are Isotopes?

Answer 6

Some elements have more than one TYPE of atom.

These are called ISOTOPES

Isotopes have the same number of protons (same element) but a different number of neutrons (different mass)