Chemistry Unit 1, Atomic composition and isotopes

Where is a proton located; what is its charge relative mass

In the nucleus; charge 1; mass 1

Where is a neutron located; what is its charge and relative mass

In the nucleus; charge 0; mass 1

Where is an electron located, and what is its charge and relative mass?

In the electron cloud; charge -1; mass ≈0

What is the atomic number of an element?

Number of protons; determines the element

What is the mass number of an atom?

Total number of protons + neutrons

How do you calculate the charge of an ion?

Charge = protons – electrons

Define an ion.

An atom that has gained or lost electrons, giving it a net charge; atom/s with electical charge

Define an isotope.

Atoms of the same element with different numbers of neutrons

Write isotopic notation for an atom with 6 protons and 8 neutrons.

Calculate protons, neutrons, electrons for

P = 11, N = 12, E = 10

How do you find the number of neutrons in an atom?

Neutrons = Mass number – Atomic number

How do you know the number of electrons in a neutral atom?

Equal to the number of protons

What is an isotope 

Atoms of the same element with the same number of protons but different numbers of neutrons.